Question

I'm very confused, can someone explain this to me?

Answer 1

Answer: 118 degrees

Explanation:

By the exterior angle theorem.

3x + 12 + 2x + 16 = 6x + 10

5x + 28 = 6x + 10

x = 18

So measure of angle 3 = 6(18) + 10 = 118 degrees