Question

Find measure angle of x

Answer 1

Angle X = 67.38

Explanation:

Cosine Law for Angles (SSS)

cosA = (b^2 + c^2 - a^2) / 2bc

Substitute that into the equation

cosA = (5^2 + 13^2 - 12^2) / 2(5)(13)

A = cos-1 [(5^2 + 13^2 - 12^2) / 2(5)(13)]

A = 67.38°