Bisecting an angle using a ruler

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

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Abstract

ere is a simple way to bisect a given angle using the simplest and most familiar geometrical instrument: a ruler (see Figure 1). It works for any angle other than a straight angle (i.e., a 180 o angle). While the procedure is simple to carry out, justifying it using the theorems of geometry may prove challenging to some students. Here is the method. Given ∡ABC with vertex B, place the ruler so that one edge is aligned along ray BA and the opposite edge overlaps with the given angle. Using a pencil, draw a line m along the other edge; see Figure 2 (a). (For the vertex and line labels, please look at Figure 3; it depicts the construction schematically.) Next, place the ruler so that one edge is aligned along ray BC and the other edge overlaps with the given angle; draw a line n along

Item Type: Articles in APF Magazines
Uncontrolled Keywords: Angle, bisection, ruler
Subjects: Natural Sciences > Mathematics
Divisions: Azim Premji University > University publications > At Right Angles
Depositing User: Mr. Sachin Tirlapur
Date Deposited: 26 Oct 2018 19:00
Last Modified: 26 Oct 2018 19:00
URI: http://publications.azimpremjifoundation.org/id/eprint/1616
Publisher URL: http://apfstatic.s3.ap-south-1.amazonaws.com/s3fs-...

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