Question

What is the degree measure of the largest angle of a triangle that has sides 7, 6, and 6 ?

Answer 1

Explanation:

The largest angle will be opposite the largest side (7)

Use Law of cosines

7^2 = 6^2 + 6^2 - 2 (6)(6) cos

solve for cos = .319

arc cos(.319) = 71.4 °