Answer:
b) 31.25
Explanation:
Since it is an isosceles triangle, the two missing angles are equal.
The sum of the angle measures in a triangle is 180 degrees.
Angle D and E are both x
So we set up an equation:
180 = 117.5 + x + x
180 = 117.5 +2x
62.5 = 2x
x = 31.25