Items where Subject is "Natural Sciences > Mathematics"

(

(APU), Azim Premji University (2020) Low floor high ceiling tasks : Summing v. At Right Angles (6). pp. 26-29. ISSN 2582-1873

(CoMaC), COMMUNITY MATHEMATICS CENTRE (2014) Enumeration of semi-regular tessellations. At Right Angles, 3 (1). pp. 12-14.

(CoMaC), Community Mathematics Centre (2017) 3 4 5... strikes again! At Right Angles, 6 (1). pp. 48-49.

(CoMaC), Community Mathematics Centre (2019) Can there be SSA congruence? At Right Angles (4). pp. 66-69.

(CoMaC), Community Mathematics Centre (2020) Chika’s test for divisibility by 7. At Right Angles (6). pp. 16-18. ISSN 2582-1873

(CoMaC), Community Mathematics Centre (2019) Computing an angle in an equilateral triangle. At Right Angles (4). pp. 102-103.

(CoMaC), Community Mathematics Centre (2017) Two problem studies. At Right Angles, 6 (1). pp. 76-79.

(CoMaC), Community Mathematics Centre (2017) What’s the next number? At Right Angles, 6 (2). pp. 54-56.

,

, CoMaC (2012) How many primitive Pythagorean triples in arithmetic progression. At Right Angles, 1 (1). pp. 33-34.

, CoMac (2012) Complete family of pythagorean triples. At Right Angles, 1 (2). pp. 27-30.

, CoMac (2013) Fun problems. At Right Angles, 2 (1). pp. 49-52.

, CoMac (2013) In his own words: George Polya. At Right Angles, 2 (1). pp. 30-34.

, CoMac (2012) Ramanujan and pythagoras! At Right Angles, 1 (2). pp. 41-42.

, CoMac (2013) An application of graphs centigrade–fahrenheit conversion. At Right Angles, 2 (1). pp. 41-43.

, CoMac (2013) A plethora: One problem, six Solutions. At Right Angles, 2 (1). pp. 35-38.

, CoMac (2018) A pythagoras-style diophantine equation and its Solution. At Right Angles, 7 (3). pp. 101-012.

, CoMαC (2012) One formula - two derivations. At Right Angles, 1 (1). pp. 35-38.

, Crux Mathematicorum (2012) Problems, the life blood of mathematics. At Right Anlges, 1 (1). pp. 65-66.

A

A S, Shailesh (2013) How To Prove It. : At Right Angles, 2 (3).

A., Ramachandran (2019) Middle school problems on averages. At Right Angles (5). pp. 74-76. ISSN 2582-1873

A., Ramachandran (2020) Middle school problems requiring exhaustive search. At Right Angles (6). pp. 67-68. ISSN 2582-1873

A., Ramachandran (2020) Solutions to search problems. At Right Angles (6). pp. 75-76. ISSN 2582-1873

A., Ramachandran (2020) Triangle centres : barycentric coordinates. At Right Angles (6). pp. 52-56. ISSN 2582-1873

A., Ramachandran (2020) A word and an idea. At Right Angles (6). p. 42. ISSN 2582-1873

AWASTHI, KHUSHBOO (2017) Drawing A SPIRAL OF SQUARE ROOTS. At Right Angles, 6 (1). pp. 39-45.

Acheson, David (2018) 1089 and all that: a journey into mathematics. At Right Angles, 7 (3). pp. 106-108.

Agadeeshan, Shashidhar J. (2019) From regular pentagons to the icosahedron and dodecahedron via the golden ratio – ii. At Right Angles (5). pp. 17-26. ISSN 2582-1873

Anand, Aradhana (2018) Creating trigonometric tables. At Right Angles, 7 (2). pp. 5-9.

Athle, Ajit. (2014) Solve a geometry problem — III. At Right Angles, 3 (3). pp. 75-77.

Athmaraman, R. (2012) Open-ended questions. At Right Angles, 1 (2). pp. 37-40.

Athmaraman, R. (2013) Problems for the Middle School. At Right Angles, 2 (3). pp. 1-3.

Athmaraman, R. (2012) Problems for the middle school. At Right Angles, 1 (2). pp. 67-69.

Athmaraman, R. (2015) Problems for the middle school. At Right Angles, 4 (3). pp. 88-91.

Athmaraman, R. (2014) Problems for the middle school. At Right Angles, 3 (3). pp. 78-79.

Athmaraman, R. (2013) Problems for the middle school. At Right Angles, 2 (1). pp. 53-55.

Azim Premji University, (APU) (2019) A very brief introduction to fractals. At Right Angles (4). p. 1.

B

B, Sury (2013) Set theory revisited as easy as pie the principle of inclusion and exclusion – part 1. At RIght Angle, 2 (1). pp. 16-19.

B., Sury (2020) Tiresome paths, water gates and Euler’s formula. At Right Angles (6). pp. 6-9. ISSN 2582-1873

BIZONY, MARCUS (2016) The 3-4-5 triangle: some observations. At Right Angles, 5 (3). pp. 12-15.

BIZONY, MARCUS (2017) THE GOLDEN RATIO Unexpectedly. At Right Angles, 6 (1). pp. 29-31.

Badiger, Arvind N. (2012) Generating PPTs-letter received from the reader. At Right Angles, 1 (2). p. 1.

Basu, Madhushree and Prasad, Amritanshu and Ravikumar, Vijay (2018) Triangular numbers. At Right Angles, 7 (1). pp. 5-12.

Bhaduri, Ananda (2019) Circles inscribed in segments. At Right Angles (4). pp. 22-26.

Bhatnagar, Gaurav (2017) How to discover the exponential function x e. At Right Angles, 6 (3). 09-13.

Bhatt, Meghraj (2019) Simple cryptography. At Right Angles (5). pp. 29-31. ISSN 2582-1873

Bizony, Marcus (2016) Three means. At Right Angles, 5 (2). pp. 50-53.

C

CENTRE, COMMUNITY MATHEMATICS (2018) Characterisation of a right triangle. At Right Angles, 7 (2). pp. 91-94.

CENTRE, COMMUNITY MATHEMATICS (2018) Problem about a finite sequence. At RIght Angles, 7 (2). pp. 137-139.

CENTRE, COMMUNITY MATHEMATICS (2018) The three circles problem. At Right Angles, 7 (2). pp. 134-136.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2018) Area covered by two intersecting circles. At Right Angles, 7 (3). pp. 59-62.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2015) Generating the n-th Prime. At Right Angles, 4 (2). pp. 28-29.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2017) Problem concerning rational numbers. At Right Angles, 6 (2). pp. 98-102.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2017) Theorem concerning a right triangle. At Right Angles, 6 (2). pp. 95-97.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2015) A baby one quarter the size of its parents. At Right Angles, 4 (2). pp. 40-43.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2015) A flower with four petals. At Right Angles, 4 (2). pp. 26-27.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2015) A potpourri of problems. At Right Angles, 4 (2). pp. 55-58.

COMMUNITY MATHEMATICS CENTRE, CoMaC (2012) The pythagorean theorem. At Right Angles, 1 (1). pp. 20-24.

CoMaC, COMMUNITY MATHEMATICS CENTRE (2015) Investigations. At Right Angles, 4 (3). pp. 58-61.

CoMaC, COMMUNITY MATHEMATICS CENTRE (2015) Two problems. At Right Angles, 4 (3). pp. 83-87.

CoMaC, CoMac (2013) A Tale of Two Formulas. At Right Angles, 2 (3). pp. 1-4.

CoMaC, The COMMUNITY MATHEMATICS CENTRE ( (2012) Ramanujan numbers. At Right Angles, 1 (2). pp. 61-62.

CoMaC, The COMMUNITY MATHEMATICS CENTRE ( (2017) A Simpler way to Bisect an Angle. At Right Angles, 6 (1). p. 47.

Comac, Comac (2017) There are infinitely prime numbers. At Right Angles, 6 (3). pp. 26-27.

Comac, Comac (2017) What to do when one gets two different answers to a counting problems. At Right Angles, 6 (3). pp. 64-66.

Comac, Comac (2017) A triangle problem. At Right Angles, 6 (3). pp. 96-98.

Community Mathematics Centre, (CoMaC) (2014) Two combinatorial problems. At Right Angles, 3 (3). pp. 70-72.

Community Mathematics Centre, (CoMaC) (2014) A nines multiples problem. At Right Angles, 3 (3). pp. 73-74.

Costa, Agnes D (2012) Exploring constructivism. At Right Angles, 1 (2). pp. 1-2.

center, Community mathematic (2018) An angle-in-a- quadrilateral problem. At Right Angles, 7 (2). pp. 101-104.

D

D E, PRITHWIJIT and SHIRALI, SHAILESH (2016) Problems for the Senior School. At Right Angles, 5 (2). pp. 77-80.

DAS, SHUBORNO (2018) Functional equations. At Right Angles, 7 (2). pp. 10-18.

DE, PRITHWIJIT (2018) The Odd-even tale. At Right Angles, 7 (2). pp. 126-129.

DE, PRITHWIJIT (2018) On an optimization problem. At Right Angles, 7 (1). pp. 80-82.

DE, PRITHWIJIT (2017) On problem posing. At Right Angles, 6 (2). pp. 82-85.

DE VILLIERS, M (2013) A Trapezium Theorem Generalized. At Right Angles, 2 (3). pp. 1-4.

DE VILLIERS, MICHAEL (2017) An example of constructive defining: from a golden rectangle to golden QUADRILATERALS and beyond. At Right Angles, 6 (2). pp. 74-81.

DE VILLIERS, MICHAEL. (2015) Flashback to the past a 1949 matric geometry question. At Right Angles, 4 (3). pp. 24-29.

DESAI, RANJIT (2016) Adventures with triples. At Right Angles, 5 (2). pp. 91-93.

Dash, Arddhendu Shekhar (2020) Justification of 90° angle construction procedure. At Right Angles (6). pp. 35-39. ISSN 2582-1873

De, P and Shirali, S (2013) Problems For The Middle School. At Right Angles, 2 (3). pp. 1-2. (Submitted)

De, Prithiwijit and Shirali, Shailesh (2017) Problems for senior school. At Right Angles, 6 (3). pp. 104-107.

De, Prithiwijit and Sircar, Swati and Titus, Sneha (2017) APC-AREA, perimeter and congruency. At Right Angles, 6 (3). pp. 55-58.

De, Prithwijit (2018) Pigeonhole principle: some applications. At Right Angles, 7 (3). pp. 74-78.

De, Prithwijit (2016) An eye on eyeball. At Right Angles, 5 (2). pp. 34-37.

De, Prithwijit (2019) A geometric exploration. At Right Angles (4). pp. 90-92.

De, Prithwijit (2012) A sweet seller’s trick. At Right Angles, 1 (1). pp. 17-19.

De, Prithwijit (2017) A triangle problem and three variants. At Right Angles, 6 (3). pp. 31-36.

De, Prithwijit and Shirali, Shailesh (2018) Problems for the senior school. At Right Angles, 7 (2). pp. 123-125.

De, Prithwijit and Shirali, Shailesh (2019) Problems for the Senior school. At Right Angles (4). pp. 87-89.

De, Prithwijit and Shirali, Shailesh (2017) Problems for the senior school. AT Right Angles, 6 (1). pp. 73-75.

De, Prithwijit and Shirali, Shailesh (2017) Problems for the senior school. At Right Angles, 6 (2). pp. 92-94.

De, Prithwijit and Shirali, Shailesh (2012) Problems for the senior school. At Right Angles, 1 (2). pp. 70-73.

De, Prithwijit and Shirali, Shailesh (2013) Problems for the senior school. At Right Angles, 2 (1). pp. 56-59.

De, Prithwijit and Shirali, Shailesh (2018) Problems for the senior school. At Right Angles, 7 (3). pp. 103-105.

De, Prithwijit and Shirali, Shailesh (2019) Problems for the senior school. At Right Angles (5). pp. 77-80. ISSN 2582-1873

De, Prithwijit and Shirali, Shailesh (2020) Problems for the senior school. At Right Angles (6). pp. 69-71. ISSN 2582-1873

De, Prithwijit and Shirali, Shailesh (2018) Problems for the senior schools. At Right Angles, 7 (1). pp. 117-119.

De, Prithwijit and Titus, Sneha and Sircar, Swati (2014) Fair Division. At Right Angles, 3 (1). pp. 31-34.

De, Prithwijit and Shirali, Shailesh (2014) Problems for the senior school. At Right Angles, 3 (3). pp. 80-81.

Dewan, Hriday Kant (2018) Interpretation of errors in arithmetic. At Right Angles, 7 (3). pp. 48-52.

F

FITZHERBERT, ANUSHKA RAO (2018) The conjecturing classroom. At Right Angles, 7 (1). pp. 38-43.

G

G. R., Veena (2019) The gap between ‘HOW’ and ‘WHY’ in mathematics…. At Right Angles (4). p. 54.

GANDHI, DR. HANEET (2017) Method in Mathness, CATALOGUING 1-UNIFORM TILINGS. At Right Angles, 6 (1). pp. 15-20.

GHOSH, JONAKI (2015) Hill ciphers. At Right Angles, 4 (3). pp. 62-71.

GHOSH, JONAKI and ADSULE, ROHIT (2018) The elementary cellular automata a journey into the computational world. At Right Angles, 7 (1). pp. 95-104.

GHOSH, JONAKI B and ADSULE, ROHIT (2018) One dimensional cellular automata-The totalistic approach. At Right Angles, 7 (2). pp. 105-116.

GOSWAMI, RICHA (2018) Misconceptions in fraction. At Right Anglesa, 7 (1). pp. 48-51.

Gandhi, Haneet (2014) Covering the Plane with repeated patterns. At Right Angles, 3 (1). pp. 5-11.

Garge, Anuradha S. (2012) Tracing the history of a theorem Lagrange’s four squares theorem. At Right Angles, 1 (2). pp. 5-9.

Gaur, S (2013) An ‘Origamics’ Activity: X-lines. At Right Angles, 2 (3). pp. 1-3.

Gaur, Shiv (2012) How do you divide a strip into equal fifths? At Right Angles, 1 (1). pp. 25-28.

Gaur, Shiv (2013) Paper play making a skeletal dodecahedron a solid geometry experience. At Right Angle, 2 (1). pp. 5-10.

Gaur, Shiv (2013) Paper play: Making a skeletal dodecahedron. At Right Angles, 2 (1). pp. 5-10.

Gaur, Shiv. (2012) Axioms of paper folding. At Right Angles, 1 (2). pp. 16-22.

Gesota, Rupesh (2018) Making sense of adding unlike fractions. At Right Angles, 7 (2). pp. 59-61.

Ghosh, Jonaki (2012) The birthday paradox. At Right Angles, 1 (1). pp. 39-42.

Ghosh, Jonaki (2019) Exploring fractals : the geogebra way. At Right Angles (4). pp. 77-83.

Ghosh, Jonaki B. (2019) The game of craps. At Right Angles (5). pp. 66-73. ISSN 2582-1873

Ghosh, Jonaki B. (2012) The monty hall problem. At Right Angles, 1 (2). pp. 55-60.

Gonick, Larry (2017) A review of the cartoon guide to Algebra and the cartoon guide to calculus. At Right Angles, 6 (2). pp. 106-112.

Gowers, William Timothy How Craig Barton wishes he’d taught maths. At Right Angles (5). pp. 83-88. ISSN 2582-1873

Gulati, Sangeeta (2017) Create your own interactive activity. At Right Angles, 6 (3). pp. 81-88.

Gulati, Sangeeta (2018) Mobile puzzles – making sense of variables and equations. At Right Angles, 7 (3). pp. 63-68.

J

JAGATHAPU, KASI RAO (2018) Bisecting an angle using a ruler. At Right Angles, 7 (2). pp. 30-32.

JOARDAR, BODHIDEEP (2017) A Property of Primitive Pythagorean triples. At Right Angles, 6 (2). pp. 67-68.

JOARDAR, BODHIDEEP (2018) Solution of Ramanujan’s door number problem by using vargaprakriti. At Right Angles, 7 (1). pp. 56-57.

JOSHI, PROF. KAPIL D (2018) Visual proof of the two-variable am-gm inequality. At Right Angles, 7 (1). pp. 54-55.

Jagadeeshan, Shashidhar (2019) From regular pentagons to the icosahedron via the golden ratio - part I. At Right Angles (4). pp. 5-9.

Jagadeeshan, Shashidhar (2018) Introducing Steven Strogatz. At Right Angles, 7 (3). pp. 109-110.

Jagadeeshan, Shashidhar (2015) Review of "math! encounters with high school students" by serge lang. At Right Angles, 4 (3). pp. 99-103.

Jagadeeshan, Shashidhar (2013) Towards mathematical disposition notes from a small school supportive learning spaces. At Right Angles, 2 (1). pp. 24-29.

Jagadeeshan, Shashidhar (2016) The magical world of infinities. At Right Angles, 5 (2). pp. 17-23.

Jagadeeshan, Shashidhar (2012) The theorem of Pythagoras. At Right Angles, 1 (1). pp. 5-13.

Jagadeeshan, Shashidhar (2017) The story of maths : a brief review. At Right Angles, 6 (3). pp. 117-118.

Jha, Shreyan (2019) Explorations on triangles with integer sides. At Right Angles (5). pp. 41-42. ISSN 2582-1873

Joardar, Bodhideep (2017) An Approximation of π by using the law of cosines. At Right Angles, 6 (3). pp. 43-45.

Joshi, Kapil D (2018) The power triangle. At Right Angles, 7 (1). pp. 33-37.

K

K, Subramaniam (2016) Jill Adler – a South African mathematics education researcher. At Right Angles, 5 (2). pp. 5-10.

K., SUBRAMANIAM (2018) The conjoining error in school algebra. At Right Angles, 7 (1). pp. 44-47.

Karmarkar, Bharat (2014) Explorations in teaching. At Right Angles, 3 (1). pp. 38-39.

Katkar, Laxman N. (2019) Extensions of the theorem of Pythagoras. At Right Angles (5). pp. 11-16. ISSN 2582-1873

Kissane, Barry (2016) Introducing Differential Calculus on a Graphics Calculator. At Right Angles, 5 (2). pp. 68-76.

Kleiner, Mark (2015) Edward Frenkel’s “Love & Math: the Heart of Hidden Reality” - a review. At Right Angles, 4 (1). pp. 66-69.

Kodur, Giri (2013) Slicing a cube sum of cubes and square of a sum understanding your identity. At Right Angle, 2 (1). pp. 11-15.

Kodur, Giri (2013) Slicing a cube: Sum of cubes and square of a sum. At Right Angles, 2 (1). pp. 11-15.

Korpal, Gaurish (2015) Say crease! folding paper in half miles please. At Right Angles, 4 (3). pp. 20-23.

Krishnamoorthy, Usha (2019) Data, perception and ignorance. At Right Angles (4). pp. 104-112.

Krishnaswamy, Rema and Biswas, Jishnu (2018) Beautiful, simple, exact, crazy. At Right Angles, 7 (1). pp. 124-127.

Kumar, Prabhat (2016) Rich Maths for Everyone: A Review of Jo Boaler’s Mathematical Mindsets. At Right Angles, 5 (2). pp. 94-98.

L

Lingefjard, Thomas and Farahani, Djamshid (2017) Teaching concept of calculus. At Right Angles, 6 (3). pp. 76-80.

M

M., Srinivasan (2020) Introducing robocompass : a nifty tool for geometrical construction. At Right Angles (6). pp. 63-66. ISSN 2582-1873

MUKHOPADHYAY, UTPAL (2018) Ramanujan and some elementary mathematical problems. Ar Right Angles, 7 (1). pp. 13-21.

Magon, Ishaan and Reddy, Maya and Suresh, Rishabh and Jagadeeshan, Shashidhar (2016) The rascal triangle A rascal full of surprises! At Right Angles, 5 (3). pp. 16-20.

Manjunath, Amrutha (2015) The methods of Archimedes. At Right Angles, 4 (3). pp. 7-15.

Miraj, Rahil (2019) Radii of in-circle and ex-circles of a right- angled triangle. At Right Angles (4). pp. 27-30.

Mishra, P and Gaurav, B (2013) Introducing Ambigrams. At Right Angles, 2 (3).

Mishra, Punya (2014) Introducing symmetry. At Right Angles, 3 (1). pp. 25-30.

Mishra, Punya (2013) The mathematical “i”. At Right Angles, 2 (1). pp. 68-69.

Mishra, Punya and Bhatnagar, Gaurav (2015) Paradoxes: Part 2 of 2. At Right Angles, 4 (2). pp. 9-14.

Mukunda, Kamala (2017) Knowing and teaching elementary mathematics. At Right Angles, 6 (1). pp. 80-84.

Mukunda, Kamala. (2012) Analyzing games of chance with math . . . fair game. At Right Angles, 1 (2). pp. 10-15.

Mukunda, M (2013) Book Reviews. At Right Angles, 2 (3). pp. 1-9.

Murthy, M. Narasimha (2019) Brahmagupta’s theorem. At Right Angles (5). p. 27. ISSN 2582-1873

N

NAIR, VINAY (2017) Divisibility by Primes. At Right Angles, 6 (2). pp. 63-66.

NAIR, VINAY (2018) Fractional triplets. At Right Angles, 7 (1). pp. 83-86.

Nair, Vinay (2015) Algebracadabra magic squares ; with prime entries. At Right Angles, 4 (3). pp. 16-19.

Nair, Vinay (2019) A mathematical pilgrimage : Ramanujan yatra. At Right Angles (5). pp. 5-10. ISSN 2582-1873

Nandi, Avipsha (2019) Orthocentre of a triangle and its distance from any point in the plane. At Right Angles (5). pp. 58-65. ISSN 2582-1873

Narasimhan, M. S. (2020) The mathematics of India by P.P. Divakaran. At Right Angles (6). pp. 77-81. ISSN 2582-1873

Nityananda, Rajaram (2014) Mathematics for the billion. Current Science, 107 (07). pp. 1087-1088. ISSN 0011-3891

Nityananda, Rajaram (2014) Singularities in a teacup: good mathematics from bad lenses. Resonance: journal of science education, 19 (9). ISSN 0973-712X

Nityananda, Rajaram (2014) Vladimir Igorevich Arnold (1937–2010). Resonance: Journal of Science Education, 19 (9). pp. 779-783. ISSN 0973-712X

O

OXMAN, VICTOR (2017) Property associated with the Orthocentre of a Triangle PROPERTY ASSOCIATED WITH THE ORTHOCENTRE OF A TRIANGLE A PROOF WITHOUT WORDS. At Right Angles, 6 (2). pp. 75-76.

Orlin, Ben (2013) A Fight With Euclid. At Right Angles, 2 (3). pp. 1-5.

P

PARTHIV, DEDASANIYA (2017) An investigation with TRIANGLES & CIRCLES. At Right Angles, 6 (2). pp. 69-72.

PATEL, TEJASH (2018) Using coordinate geometry to find the GCD and LCM of two numbers a & b. At Eight Angles, 7 (1). pp. 58-59.

Padyala, Radhakrishnamurty (2020) Geometrical proof of an application of Ptolemy’s theorem. At Right Angles (6). pp. 43-44. ISSN 2582-1873

Patil, Dev ChandanAdhiraj (2017) Happy numbers. At Right Angles, 6 (3). pp. 37-39.

Patil, Pratima (2018) Mini review numero friendly board games. At Right Anlges, 7 (2). pp. 143-145.

Patnaik, Rajkishore (2013) Numberphile. At Right Angles, 2 (1). p. 64.

Prakash, Anand (2019) A modified pascal triangle. At Right Angles (5). pp. 37-40. ISSN 2582-1873

Prasad, Ashok (2020) Conversations on greatest common divisor. At Right Angles (6). pp. 30-34. ISSN 2582-1873

Prasad, Phoolan (2018) Mathematics olympiads in India. At Right Angles, 7 (3). pp. 85-91.

R

R, ATHMARAMAN (2015) Problems for the Middle School. At Right Angles, 4 (1). pp. 59-61.

R, ATHMARAMAN (2016) Problems for the Middle School. At Right Angles, 5 (2). pp. 81-84.

R, Haragopal (2017) G-numbers. At Right Angles, 6 (3). pp. 59-63.

R., Athmaraman (2015) Problems for the middle school. At Right Angles, 4 (2). pp. 59-61.

R., Haragopal (2019) ‘CuRe’ triplets. At Right Angles (4). pp. 45-47.

R., Haragopal (2020) Hara’s triangle and triple. At Right Angles (6). pp. 23-25. ISSN 2582-1873

RAMACHANDRAN, A (2018) Mapping triangle shapes. At Right Angles, 7 (2). pp. 67-71.

RAMACHANDRAN, A. (2017) CONGRUENCY AND CONSTRUCTIBILITY IN TRIANGLES. At Right Angles, 6 (1). pp. 50-52.

RAMACHANDRAN, A. (2018) Middle School Problems understanding circular motion. At Right Angles, 7 (2). pp. 117-120.

RAMALINGAM, RAMYA (2017) Tying it up … KNOT THEORY … without loose ends. At Right Angles, 6 (1). pp. 5-13.

RAMYA, P. S. (2017) Knot Theory Addendum. At Right Angles, 6 (1). p. 14.

RANE, UJJWAL (2017) FAGNANO’S PROBLEM A Geometric Solution. At Right Angles, 6 (1). pp. 21-24.

RUDRA, SANJIB (2018) Alternative solution to ‘A triangle problem’. At Right Angles, 7 (2). pp. 121-122.

RVS, RAJAGOPALAN (2018) Triangle inequality - a curious counting result. At Right Angles, 7 (2). pp. 39-41.

Radhu, Jaleel (2019) A challenging geometric construction problem. At Right Angles (5). pp. 81-82. ISSN 2582-1873

Raghunath, Sabitha and Bhansali, Sneha (2019) π enters the 5th class. At Right Angles (4). pp. 33-37.

Ramachadran, M (2013) The Gregorian Calendar. : At Right Angles, 2 (3). pp. 1-3.

Ramachandran, A (2014) From magic squares to magic carpets. At Right Angles, 3 (2). pp. 31-33.

Ramachandran, A (2014) A puzzle leading to some interesting mathematics. At Right Angles, 3 (1). pp. 36-37.

Ramachandran, A. (2015) Angle bisectors in a quardilateral. At Right Angles, 4 (1). pp. 33-35.

Ramachandran, A. (2019) DIY problems for the middle school. At Right Angles (4). pp. 84-86.

Ramachandran, A. (2019) Generalising the divisibility tests of 9 and 11. At Right Angles (5). pp. 32-33. ISSN 2582-1873

Ramachandran, A. (2018) Problems for the middle school problems related to divisibility. At Right Angles, 7 (3). pp. 69-73.

Ramachandran, A. (2018) Some down-to-earth trigonometry. At Right Angles, 7 (3). pp. 53-58.

Ramachandran, A. (2015) Triangle centres in an isosceles triangle. At Right Angles, 4 (3). pp. 30-34.

Ramachandran, A. (2013) Triangles with sides in a progression. At Right Angles, 2 (1). pp. 39-40.

Ramachandran, A. (2012) The four-gon family tree. At Right Angles, 1 (1). pp. 53-57.

Ramachandran, A. (2019) A path to π. At Right Angles. pp. 31-32.

Ramanujam, R (2017) Review of G H Hardy’s a mathematician's apology. At Right Angles, 6 (3). pp. 112-116.

Ramanujam, R. (2014) Review of Kim Plofker’s mathematics in India. At Right Angles, 3 (3). pp. 82-88.

Ramesh, Sreekantan (2013) Yitang Zhang and The Twin Primes Conjecture. At Right Angles, 2 (3). pp. 1-4.

Ramprashanth, V. (2017) Tonic ambiguity. At Right Angles, 6 (3). pp. 22-26.

Rane, Ujjawal (2017) Fagnano’s theorem: alternative proof. At right Angles, 6 (3). pp. 50-52.

S

S H I R A L I, P A D M A P R I Y A (2017) The secret world of large numbers. At Right Angles, 6 (2). pp. 2-11.

SAHA, SUHAS (2017) Teaching the ternary base using a card trick. At Right Angles, 6 (2). pp. 22-29.

SANAPALA, SEETHA RAMA RAJU (2018) Why does Euclid’s GCD algorithm work? At Right Angle, 7 (1). pp. 60-61.

SHIRALI, SHAILESH (2014) Equalizers of a triangle. At Right Angles, 3 (2). pp. 14-17.

SHIRALI, SHAILESH A. (2015) How to prove it. At Right Angles, 4 (1).

STUPEL, DR. MOSHE and FRAIVERT, DR. DAVID (2018) Formulas for special segments in a triangle. Right Angles, 7 (2). pp. 72-85.

STUPEL, DR. MOSHE and OXMAN, DR. VICTOR (2018) An easy construction for the harmonic mean. At Right Angles, 7 (1). pp. 52-53.

Sastri, Sivasankara (2012) Paper folding and the theorem of Pythagoras. At Right Angles, 1 (1). pp. 48-52.

Sethuraman, B A (2013) Fermat Numbers. At Right Angles, 2 (3). pp. 2-5.

Shah, Tanuj (2016) A diagonal investigation. At Right Angles, 5 (2). pp. 38-41.

Shaikh, Majid (2015) Divisibility tests by powers of 2. At Right Angles, 4 (2). pp. 20-23.

Shailesh, Shirali (2014) Harmonic triples. At Right Angles, 3 (1). pp. 20-24.

Sharili, Shailesh (2017) How to prove it. At Right Angles, 6 (3). pp. 40-42.

Sharma, Shailaja D (2018) Visual method for fraction multiplication. At Right Angles, 7 (2). pp. 55-58.

Shirali, P (2013) Teaching Subtraction. At Right Angles, 2 (3). pp. 1-16.

Shirali, Padmapriya (2020) Angles. At Right Angles (6). pp. 1-16. ISSN 2582-1873

Shirali, Padmapriya (2018) Approaches to equation. At Right Angles, 7 (3). pp. 1-16.

Shirali, Padmapriya (2012) Fraction: a paper folding approach. At Right Angles, 1 (1). pp. 80-86.

Shirali, Padmapriya (2015) Measurement. At Right Angles, 4 (2). pp. 1-12.

Shirali, Padmapriya (2019) Percentages. At Right Angles (5). pp. 1-12. ISSN 2582-1873

Shirali, Padmapriya (2019) Ratio. At Right Angles (4).

Shirali, Padmapriya (2017) Teaching Time. At Right Angles, 6 (1). pp. 1-16.

Shirali, Padmapriya (2012) Teaching decimal fractions - a paper kit approach. At Right Angles, 1 (2). pp. 1-7.

Shirali, Padmapriya (2015) Teaching geometry-II. At Right Angles, 4 (1). pp. 1-16.

Shirali, Padmapriya (2015) Teaching thinking skills. At Right Angles, 4 (3). pp. 1-12.

Shirali, Padmapriya (2013) A place value. At Right Angles, 2 (1). pp. 1-12.

Shirali, S (2013) The Closing Bracket . . At Right Angles, 2 (3). p. 1.

Shirali, Shailes (2017) How to prove it. At Right Angles, 6 (1). pp. 59-63.

Shirali, Shailesh (2015) 1,5,3 and so on and on and on …. At Right Angles, 4 (2). pp. 24-25.

Shirali, Shailesh (2015) 3,4,5...And other memorable triples – Part I. At Right Angles, 4 (2). pp. 15-19.

Shirali, Shailesh (2017) Adventures in problem solving. At Right Angles, 6 (3). pp. 108-111.

Shirali, Shailesh (2018) Adventures in problem solving. At Right Angles, 7 (3). pp. 79-84.

Shirali, Shailesh (2019) Adventures in problem solving. At Right Angles (4). pp. 96-101.

Shirali, Shailesh (2020) Adventures in problem solving. At Right Angles (6). pp. 72-74. ISSN 2582-1873

Shirali, Shailesh (2018) Adventures in problem solving : a problem about divisors. At Right Angles, 7 (2). pp. 130-132.

Shirali, Shailesh (2017) Adventures in problem-solving : a math olympiad problem... and a few cousins. At Right Angles, 6 (2). pp. 101-105.

Shirali, Shailesh (2018) Adventures in problem-solving miscellaneous problems from the RMOs. At Right Angles, 7 (1). pp. 112-116.

Shirali, Shailesh (2016) And other memorable triples. At Right Angles, 5 (2). pp. 27-33.

Shirali, Shailesh (2018) Arsalan’s amazing area problems. At Right Angles, 7 (3). pp. 92-100.

Shirali, Shailesh (2016) Complex Napoleon's theorem made simple - part 1. At Tight Angles, 5 (3). pp. 5-11.

Shirali, Shailesh (2017) Complex Napoleon's theorem made simple - part 2. At Right Angles, 6 (3). pp. 28-30.

Shirali, Shailesh (2020) Euler’s inequality for the circumradius and inradius of a triangle. At Right Angles (6). pp. 58-62. ISSN 2582-1873

Shirali, Shailesh (2018) Extending the definitions of GCD and LCM to fractions. At RIght Angles, 7 (2). pp. 33-38.

Shirali, Shailesh (2017) Fagnano's problem Addendum. At Right Angles, 6 (1). pp. 25-28.

Shirali, Shailesh (2017) Harmonic triangular triples. At Right Angles, 6 (3). pp. 89-95.

Shirali, Shailesh (2012) How to generate Pythagorean triples - 1. At Right Angles, 1 (1). pp. 29-32.

Shirali, Shailesh (2015) How to prove It. At Right Angles, 4 (2). pp. 44-47.

Shirali, Shailesh (2014) How to prove it. At Right Angles, 3 (2). pp. 54-58.

Shirali, Shailesh (2018) How to prove it. At Right Angles, 7 (2). pp. 95-100.

Shirali, Shailesh (2019) How to prove it. At Right Angles (4). pp. 70-76.

Shirali, Shailesh (2019) How to prove it. At Right Angles (5). pp. 51-57. ISSN 2582-1873

Shirali, Shailesh (2018) Inequalities in algebra and geometry. At Right Angles, 7 (1). pp. 75-79.

Shirali, Shailesh (2017) Inequalities in algebra and geometry. At Right Angles, 6 (1). pp. 53-58.

Shirali, Shailesh (2017) Inequalities in algebra and geometry. At Right Angles, 6 (3). pp. 67-72.

Shirali, Shailesh (2017) Inequalities in algebra and geometry part 2. At Right Angles, 6 (2). pp. 38-47.

Shirali, Shailesh (2018) On divisibility by 27. At Right Angles, 7 (1). pp. 62-65.

Shirali, Shailesh (2013) One equation . . . many connects harmonic triples. At Right Angles, 2 (1). pp. 20-23.

Shirali, Shailesh (2020) Pretty power play. At Right Angles (6). pp. 45-47. ISSN 2582-1873

Shirali, Shailesh (2012) Proof without words. At Rights Angles, 1 (1). pp. 14-16.

Shirali, Shailesh (2017) Quadrilaterals with perpendicular diagonals. At Right Angles, 6 (2). pp. 30-37.

Shirali, Shailesh (2015) Some problems from the Olympiads. At Right Angles, 4 (1). pp. 56-58.

Shirali, Shailesh (2018) Stirling set numbers & powers of integers. At Right Angles, 71 (1). pp. 26-32.

Shirali, Shailesh (2018) Theorem concerning a magic triangle. At Right Angles, 7 (2). pp. 86-90.

Shirali, Shailesh (2015) Triangle in a rectangle. At Right Angles, 4 (1). pp. 64-65.

Shirali, Shailesh (2015) When does it have maximum area? At Right Angles, 4 (2). pp. 53-54.

Shirali, Shailesh (2012) The closing bracket ... At Right Angles, 1 (2). p. 1.

Shirali, Shailesh (2020) The closing bracket : a tale of two viruses. At Right Angles (6). p. 82. ISSN 2582-1873

Shirali, Shailesh (2015) The closing bracket. At Right Angles, 4 (1).

Shirali, Shailesh (2019) The constants of mathematics - part IV : yet more on the remarkable number e. At Right Angles (4). pp. 10-18.

Shirali, Shailesh (2018) The constants of mathematics. At Right Angles, 7 (2). pp. 19-27.

Shirali, Shailesh (2019) A counter-intuitive Pythagorean surprise. At Right Angles (4). pp. 19-21.

Shirali, Shailesh (2017) The exponential series: an addendum. At Right Angles, 6 (3). pp. 14-21.

Shirali, Shailesh (2019) A triangle area problem. At Right Angles (4). pp. 93-95.

Shirali, Shailesh and Athmaraman, R. (2012) Fun Problems : problems for the middle school, problems for the senior school. At Right Angle, 1 (1). pp. 67-75.

Shirali, Shailesh and DE, PRITHWIJIT (2015) Problem for the senior schools. At Right Angles, 4 (1). pp. 62-63.

Shirali, Shailesh and De, Prithwijit (2015) Problems for the senior school. At Right Angles, 4 (2). pp. 62-63.

Shirali, Shailesh and De, Prithwijit (2015) The problem for the senior schools. At Right Angles, 4 (3). pp. 93-94.

Shirali, Shailesh and Shirali, Padmapriya (2014) Exploration of recurring decimals:Some explanations. At Right Angles, 3 (1). pp. 40-48.

Shirali, Shailesh A (2016) How to prove it. At Right Angles, 5 (2). 58 -62.

Shirali, Shailesh A. (2012) The fine art of euclidean geometry Viviani’s theorem . . . and a cousin. At Right Angles, 1 (2). pp. 23-26.

Shirali, p (2013) Exploration of Recurring Decimals. At Right Angles, 2 (3). pp. 1-4.

Shirali, Shailesh (2017) Complex Napoleon's theorem made simple. At Right Angles, 6 (3). pp. 28-30.

Sircar, Swati (2019) Exploring properties of addition and multiplication with integers. At Right Angles (4). pp. 59-65.

Sircar, Swati (2018) Exploring properties of addition with whole numbers and fractions. At Right Angles, 7 (2). pp. 51-54.

Sircar, Swati (2020) Impossible triangles on dot sheets. At Right Angles (6). ISSN 2582-1873

Sircar, Swati (2019) Low floor high ceiling tasks : in-cyclic quads. At Right Angles (5). pp. 47-50. ISSN 2582-1873

Sircar, Swati (2018) Mini Review: Weird number. At Right Angles, 7 (1). p. 123.

Sircar, Swati (2015) Of paper folding, geogebra and conics. At Right Angles, 4 (2). pp. 48-52.

Sircar, Swati (2015) Of paper-folding, geogebra and conics – Part II. At Right Angles, 4 (3). pp. 72-83.

Sircar, Swati (2020) Rewriting math textbooks. Teacher Plus, 18 (5). pp. 68-71. ISSN 0973-778

Sircar, Swati (2019) Tearout : fun with dot sheets. At Right Angles (4). pp. 55-58.

Sircar, Swati (2019) Tearout : isometric sketches and more. At Right Angles (5). pp. 43-46. ISSN 2582-1873

Sircar, Swati (2015) Thoughts on the division operation. At Right Angles, 4 (2). pp. 36-39.

Sircar, Swati (2014) Un-folding. At Right Angles, 3 (2). pp. 42-48.

Sircar, Swati and Titus, Sneha (2015) Investigations with Pentominoes. At Right Angles, 4 (1). pp. 40-49.

Sircar, Swati and Titus, Sneha (2019) Joining the dots... At Right Angles (4). pp. 48-53.

Sircar, Swati and Titus, Sneha (2015) Keeping things in proportion. At Right Angles, 4 (2). pp. 30-35.

Sircar, Swati and Titus, Sneha (2018) Low floor high ceiling tasks here we go round… newer and newer spirals -open and shut cases. At Right Angles, 7 (1). pp. 66-71.

Sircar, Swati and Titus, Sneha (2017) Low floor high ceiling tasks sums of consecutive natural numbers. At Right Angles, 6 (2). pp. 57-62.

Sreedevi, S and Banrejee, J and Titus, S (2013) Teacher’s Diary on Classroom Assessment. At Right Angles, 2 (3). pp. 1-5.

Stupel, Moshe and Siegler, Dr. Avi (2017) Three elegant proofs of mathematical properties. At Right Angles, 6 (2). pp. 48-53.

Subramaniam, K. (2013) Pólya to the rescue: When you don’t know the solution to a problem. At Right Angles, 2 (1). pp. 60-63.

Suresh, Dakshayini (2015) Review of "the sand reckoner" by gillian bradshaw. At Right Angles, 4 (3). pp. 95-99.

Sury, B (2013) Harmonic Sequence and Pascal’s Triangle. At Right Angles, 2 (3). pp. 1-4.

shirali, Padmapriya (2016) Teaching area and perimeter. At Right Angles, 5 (2). pp. 1-16.

shirali, shailesh (2016) A 80-80-20 Triangle. At Right Angles, 5 (2). pp. 63-65.

shirali, shailesh (2016) Addendum to “A 20-30-130 triangle”. At Right Angles, 5 (2). pp. 66-67.

shirali, shailesh (2016) Digital roots of perfect numbers. At Right Angles, 5 (2). pp. 45-49.

shirali, shailesh (2016) A Problem Study. At Right Angles, 5 (2). pp. 85-90.

shirali, shailesh (2016) The difference-of-two-squares formula: A new look. At Right Angles, 5 (2). pp. 54-57.

T

TIKEKAR, V G (2018) Addendum to power triangle. At Right Angles, 7 (2). pp. 28-29.

TIKEKAR, V G (2013) There are Infinitely many Primes. At Right Angles, 2 (3). pp. 1-4.

TIKEKAR, V.G. (2014) There are infinitely many primes. At Right Angeles, 3 (1). pp. 15-19.

TITUS, SNEHA (2017) Problems for the MIDDLE SCHOOL. At Right Angles, 6 (2). pp. 86-91.

Takker, Shikha (2019) Understanding learners’ thinking through an analysis of errors. At Right Angles (4). pp. 38-44.

The COMMUNITY MATHEMATICS CENTRE, COMAC (2017) COnnecting the dots... The art and science of interpolation and extrapolation. At Right Angles, 6 (2). pp. 12-16.

Tikekar, V.G. (2014) Morley’s miracle - part I. At Right Angles, 3 (2). pp. 10-13.

Tikekar, V.G. (2017) On the sums of powers of natural numbers. At Right Angles, 6 (3). pp. 5-8.

Titus, Sneha (2012) How about a math portfolio? At Right Angles, 1 (1). pp. 43-47.

Titus, Sneha (2012) NRICH. At Right Angles, 1 (2).

Titus, Sneha (2018) Problems for the middle school. At Right Angles, 7 (1). pp. 105-111.

Titus, Sneha (2014) Teacher's diary on classroom assessment - III. At Right Angles, 3 (2). pp. 34-41.

Titus, Sneha (2018) The gentle man who taught infinity. At Right Angles, 7 (2). pp. 140-142.

Titus, Sneha and Athmaraman, R (2017) Problems for the middle school. At Right Angles, 6 (1). pp. 70-72.

Titus, Sneha and Athmaraman, R. (2017) Problems for the middle school. At Right Angles, 6 (3). pp. 99-103.

Titus, Sneha and Ghosh, Jonaki B. (2013) In a dynamic geometry environment: Exploring problems in geometry. At Right Angles, 2 (1). pp. 44-48.

Titus, Sneha and Sircar, Swati (2017) DADS Rule! At Right Angles, 6 (1). pp. 33-38.

V

Vyawahare, Anantw (2017) Divisibility by 7. At Right Angles, 6 (3). pp. 73-75.

V.G., Tikekar (2015) Morley´s Miracle – Part III. At Right Angles, 4 (2). pp. 5-8.

VAIDYA, ARUN (2017) The breaking of the IM CODE. At Right Angles, 6 (2). pp. 5-11.

VILLIERS, MICHAEL DE (2018) A cyclic Kepler quadrilateral & the golden ratio. At Right Angles, 7 (1). pp. 91-94.

VISWANATH, SANKARAN (2017) Predicting the future. At Right Angles, 6 (2).

Venkataraman, Geetha (2016) Through the symmetry lens. At Right Angles, 5 (2). pp. 11-16.

Venkataraman, Geetha and Khemani, Shreya (2012) Close encounters of the ‘Math ED’ kind. At Right Angles, 1 (2). pp. 31-36.

Venkataraman, Geetha (2016) Through the symmetry lens, part 1 : planar symmetry and frieze pattern. At Right Angles, 5 (1). pp. 5-14.

Venkatasubban, Rajatadri (2019) An unusual proof of the centroid theorem. At Right Angles (5). pp. 34-36. ISSN 2582-1873

Vikranth, Vishak (2020) Product numbers. At Right Angles (6). pp. 40-41. ISSN 2582-1873

Villiesrs, Michael De (2017) From a golden Rectangle to golden Quadrilaterals And beyond. At Right Angles, 6 (1). pp. 64-69.

Vyawahare, Anant (2016) The digital root. At Right Angles, 5 (2). pp. 42-44.

Y

Yadav, Naveenkumar (2017) On scalene triple. At Right Angles, 6 (3). pp. 46-49.