Question

WILL GIVE BRAINLIEST!
Find the measure of ∠a. (Let b = 66°, and let c = 172°.)
m∠a =
°

Answer 1

Answer: a = 122*

The three angles added together form a circle or 360*.

Set a + b + c = 360 and solve for a

a + 66 + 172 = 360

Subtract 238 from both sides to get a

a = 122*