Unlock the Secret Formula for Triangle Area 🧮

This short video shows how to prove that the area of the triangle is given by the product of the inradius and the semiperimeter. Here is a longer, alternate version: https://youtu.be/lRDtdIyFhpE

Thanks to Colin Wright for suggesting this particular visualization.
_______________________________
Music in this video:
Prelude No. 9 by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/

Source: http://chriszabriskie.com/preludes/

Artist: http://chriszabriskie.com/