Question

On a piece of paper, use a protractor to construct a triangle with angle measures of 50° and 70º.

What is the measure of the third angle?

A 60°

B 80°

C 100°

D 180°

Answer 1

50 + 70 = 120

triangle has sum = 180

180 - 120 = 60

 third angle = 60

answer: A 60°