CPM Homework Help : CCA2 Problem 12-91

An isosceles triangle has sides with lengths $10, 10,$ and $5$ cm. What are the measures of the angles in the triangle?

Hint:

First draw the triangle and label the sides and angles.
Then use the Law of Cosines to find the first angle.
Then use the Law of Sines to find the others.

Answer:

$≈ 75.52^\circ, 75.52^\circ, 28.96^\circ$