Question

What is the measure of cº?
A. 7.5°
B. 15
C. 30°
D. 45

Answer 1

x = 15

Explanation:

The sum of the angles in a triangle is 180º

3x + 5x + 4x = 180

Combine like terms

12x = 180

Divide both sides by 12

x = 15

C = 5x

C = 5 * 15

C = 75º