Answer:
Step-by-step explanation:
You use the Law of Cosines when you know all three sides and want to find the angles of a triangle.
For example, if you want to find ∠A, you use the formula
1. ∠ A
2. ∠B
3. ∠C
Answer:
Option D) ∠FED
Step-by-step explanation:
Options A, B and C are actual exterior angles, but Option D is just a vertically opposite angle to ∠BEH
#2 Has 1 Line of symmetry