Question

I NEED HELP BUT THE ANSWER MUST WORK ON KHAN ACADEMY

Answer 1

72

Explanation:

We know that , the sum of interior angles of any shape can be measured using the formula: (n-2)× 180; where, n is the number of sides in the shape.

Here, the figure is a triangle. Therefore,

n= 3

(3-2)* 180=180°

Hence, the sum of all angles in this figure is 180.

That is, 77+31+x= 180°

108+x=180°

x= 180-108= 72°

Therefore, x= 72°

Answer 2

x = 72

Explanation:

This is because if you add all the angles in a triangle they should add to 180. 77+31=108

180-108=72