30° + 2x = 180°
2x = 180° - 30°
2x = 150°
x = 150° : 2
x = 75° (A)
Answer:
A. 77
Step-by-step 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.
