Question

Find the value of x° 30°

A. 75
B. 70
C. 60
D. 80

Answer 1

30° + 2x = 180°

2x = 180° - 30°

2x = 150°

x = 150° : 2

x = 75° (A)

Answer 2

A. 77

Explanation:

This is an isosceles triangle, if the top angle is 30 then the other two angles' sum is 150 and equal to each other so the answer is 75.