Question

Find the measure of the missing angle using the triangle angle sum theorem

Answer 1

x = 60°

Explanation:

A triangle is equal to 180°

Make an equation and solve:

30° + 90° + x = 180°

120° + x = 180°

x = 180° - 120°

x = 60°

Answer 2

m∠60

Explanation:

30 + 90 = 120

180-120=60