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A

Adiga, Shreyas S (2021) A functional equation from APMO 2019. At Right Angles. pp. 82-83. ISSN 2582-1873

Azim Premji University, Math Space (2021) Review : counters. At Right Angles. pp. 97-100. ISSN 2582-1873

C

Chhabra, Nishtha (2021) Kasuti : the mathematics of embroidery. At Right Angles. pp. 7-12. ISSN 2582-1873

D

Dash, Arddhendu Shekhar (2021) Verbal communication in a mathematics classroom. At Right Angles. pp. 18-20. ISSN 2582-1873

De, Prithwijit (2021) Adventure with quadratic equations. At Right Angles. pp. 104-108. ISSN 2582-1873

Dhasmana, Preeti (2021) Finding out area by using symmetry. At Right Angles. pp. 44-53. ISSN 2582-1873

G

Ghosh, Sourangshu (2021) Inequalities - part 2. At Right Angles. pp. 109-112. ISSN 2582-1873

Ghoshal, Manoranjan (2021) Angle trisection – an approximate procedure. At Right Angles. pp. 71-72. ISSN 2582-1873

I

Islam, Mujahidul (2021) Playing with turtle blocks. At Right Angles. pp. 87-96. ISSN 2582-1873

K

K., Baburajan (2021) Areas of triangles between two parallel lines with same base are equal : proof(?) by paper folding. At Right Angles. pp. 21-30. ISSN 2582-1873

K., Sasikumar (2021) Trigonometric proof of Ptolemy’s theorem. At Right Angles. pp. 113-114. ISSN 2582-1873

Kalbhavi, Praneetha (2021) Solution to a problem from the CMI entrance test 2020. At Right Angles. pp. 79-81. ISSN 2582-1873

M

Mathematics Co-Development Group, APF (2021) Deciphering the median formula - part 2 : from the Ogives. At Right Angles. pp. 56-63. ISSN 2582-1873

Metz, James (2021) The Tachymeter and the Hyperbola. At Right Angles. pp. 54-55. ISSN 2582-1873

Mouli, Haran and Gandhi, Mahavir and Chavan, Sarth (2021) Rational ‘twin’ isosceles triangles. At Right Angles. pp. 115-119. ISSN 2582-1873

P

Padyala, Radhakrishnamurty (2021) An easy proof of Ptolemy’s theorem. At Right Angles. pp. 66-68. ISSN 2582-1873

Patil, Swasti and Laxshmisha, Siddharth and Christino, Davin (2021) Exploring and connecting : inradius and factorisation. At Right Angles. pp. 73-78. ISSN 2582-1873

Purkait, Soham (2021) A relation between polynomial and exponential functions. At Right Angles. pp. 84-86. ISSN 2582-1873

R

Ramachandran, A. (2021) Bachet’s problem. At Right Angles. pp. 64-65. ISSN 2582-1873

Ramachandran, A. (2021) Middle school problems-theme: number of digits. At Right Angles. pp. 69-70. ISSN 2582-1873

S

S, Jayasree (2021) Quantifying steepness – a reflection. At Right Angles. pp. 31-37. ISSN 2582-1873

Sadagopan, Rajesh (2021) My Square is your Triangle! – The king said to Pascal. At Right Angles. pp. 38-43. ISSN 2582-1873

Shirali, Padmapriya (2021) Coordinates. At Right Angles. pp. 1-12. ISSN 2582-1873

Sircar, Swati (2021) Mini review : Bayes' theorem and independence by 3Blue1Brown. At Right Angles. pp. 101-103. ISSN 2582-1873

T

Tikekar, V.G. (2021) Spoof numbers and spoof solutions - part I. At Right Angles. pp. 13-17. ISSN 2582-1873

द

दास, अर्धेन्दु शेखर (2021) गणित की कक्षा में मौखिक बातचीत. At Right Angles. ISSN 2582-1873

ध

धस्माना, प्रीति (2021) सममिति का उपयोग करके क्षेत्रफल का पता लगाना. At Right Angles. ISSN 2582-1873