Answer:
Option C, 40
Step-by-step explanation:
In a given triangle if two side are equal then opposite angle of these equal sides will be equal.
By this statement in the give triangle there will be three angles x°, x° and 100°
So x + x + 100 = 180°
2x + 100 = 180°
2x = 180 - 100
2x = 80
x = 40°
Option C will be the answer.
