Question

On a piece of paper, use a protractor to construct a triangle with angle measures of 40° and 60º. What is the measure of the third angle?

Answer 1

The third angle would be equal to 180 - 40 - 60 = 80°. Hope you like it.

Answer 2

sum of angles in a triangle=180
third angle=180-first angle+second angle
180-40+60
third angle=180-100
=80