https://docs.google.com/document/d/1xcNao2zln7Urm6Ru3_hhyFbvxgoNeoJvzc0fXHk56_s/edit?usp=sharing
Unit 1 Lesson 4, Example 4 through Unit 1 Lesson 5 "9. Angle Bisector"
https://drive.google.com/open?id=1QGSg17Ss3Sn2bj5kI19oklHp3tOphWMPoGdOp0zj6fE
Guess That Angle
Geometry Lab: Guess that Angle