Answer:
D
Step-by-step explanation:
The triangle is an isosceles triangle (2 sides same).
The sides BC and AC are radius of the circles, so these 2 sides are congruent. So, the opposite angles are equal as well. Since one angle is given as 20, the other angle is also 20.
So, we have the three angles of the triangle as:
20, x, and 20
We know, sum of 3 angles of a triangle is 180, thus we can write:
20 + x + 20 = 180
Now, we solve for x:
20 + x + 20 = 180
40 + x = 180
x = 180 - 40
x = 140
Correct answer is D
