Question

Triangle ABC is a right scalene triangle. If ∠ = 72°, what is the measure of ∠?

Answer 1

18°

Explanation:

The sum of the 3 angles in a triangle = 180° , then

90° + 72° + ∠? = 180°

162° + ∠? = 180° ( subtract 162° from both sides )

∠? = 18°