20 - 30- 130, a trigonometric solution

Community Mathematics Centre, CoMaC (2016) 20 - 30- 130, a trigonometric solution. At Right Angles, 5 (1). pp. 68-70. ISSN 2582-1873

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Abstract

The problem we study in this short note belongs to an extremely interesting class of geometrical problems. Typically, they deal with triangles with many lines drawn within them, intersecting at angles whose measures are an integer number of degrees. We are required to find the measure of some indicated angle. A common feature of these problems is that solutions using only pure geometry are difficult to find (though not impossible), and one is forced to fall back upon trigonometry

Item Type: Articles in APF Magazines
Authors: Community Mathematics Centre, CoMaC
Document Language:
Language
English
Uncontrolled Keywords: Integer degree, Sine rule, Complementary angle, Supplementary angle
Subjects: Natural Sciences > Mathematics
Divisions: Azim Premji University > University Publications > At Right Angles
Full Text Status: Public
URI: http://publications.azimpremjifoundation.org/id/eprint/3117
Publisher URL:

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