∠A and ∠B are supplementary angles. If ∠A = 115 then ∠B = ?

∠A and ∠B are supplementary angles. If ∠A = 115 then ∠B = ?

A 85°

B 65°

C 183°

D 75°

Solution

Correct Answer: Option B

B=∠180⁰-∠A
=180⁰-115⁰=65⁰