Question

Write an equation to find the unknown angle measure in each triangle. and find the value of x:

The measures of two of the angles are 25° and 65°

Answer 1

In a triangle, the sum of all three angles is always equal to 180 degrees. Therefore, to find the measure of the unknown angle in the triangle, you can subtract the sum of the known angle measures from 180 degrees.

Let x be the measure of the unknown angle. Then, the equation to find x is:

x + 25° + 65° = 180°

Simplifying the equation, we get:

x = 180° - 25° - 65°

x = 90°

Therefore, the measure of the unknown angle is 90 degrees.