Question

Use exterior angle Theorem to find the measures of and D .

Answer 1

B = 90

Explanation:

By the exterior angle theorem, the sum of two interior angles is equal to the exterior angle of the remaining angle:

A + B = C

2g + 9g = 110

11g = 110

g = 10

Now, plug g in to find B:

B = 9*10

B = 90