Question

what are methods to divide an angle 3parts​

Answer 1

Answer:

Trisection can be approximated by repetition of the compass and straightedge method for bisecting an angle.

Step-by-step explanation:

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Answer 2

Answer:

In addition, trisection of an arbitrary angle can be accomplished using a marked ruler (a Neusis construction) as illustrated above (Courant and Robbins 1996). An angle can also be divided into three (or any whole number) of equal parts using the quadratrix of Hippias or trisectrix.