Question

On a piece of paper use a protractor to construct a triangle with angle measures of 40 and 60 what is the measure of the third angle?

Answer 1

80°

Explanation:

The angles of a triangle must add up to 180°.

40° + 60° + missing angle = 180°

100° + missing angle = 180°

subtract 100° from both sides

missing angle = 80°