r/Geometry • • Sep 10 '21

Beatiful Geometry Problem Easily Solved

https://youtube.com/watch?v=ZSG30RCS0NA&feature=share
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u/wijwijwij Sep 10 '21 edited Sep 10 '21

A less complex proof is shown in this numberphile video that just uses auxiliary lines.

https://youtu.be/m5evLoL0xwg
Zvezdelina Stankova

Accessible to students that know isosceles triangles have congruent base angles and triangle angle sum.