Question

What is the value of x?

Answer 1

Answer:

121°

Step-by-step explanation:

The angle with measure x is an exterior angle of the triangle.

The angles measuring 90° and 31° are the remote interior angles to the exterior angle.

Theorem:

In a triangle, the measure of an exterior angle equals the sum of the measures of its remote interior angles.

x = 31 + 90

x = 121°