Geometry: Unit 11 Lesson 1
https://docs.google.com/document/d/1geZMnpnmpNZBlwn_OmMYRpZfQyye48ph-I5usZ7yF4Q/edit?usp=sharing
https://docs.google.com/document/d/1V8TQLxltOS0YUJwtDWI-a7uo6TE9bgEqSkwuNDYnaDU/edit?usp=sharing
Geometry Lab: Proving if a triangle is a right triangle