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?

Answer 1

The measure of the third angle is 60 degrees

Explanation:

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

Let

x ----> the measure of the third angle

so

`50^o+70^o+x=180^o`

solve for x

`120^o+x=180^o`

`x=180^o-120^o=60^o`

therefore

The measure of the third angle is 60 degrees