I WILL GIVE BRAINLIEST TO WHO ANSWERS RIGHT!!! The measure of A is 100°. Angles A and B are supplementary. What is mB? A.mB = 10
° B.mB = 80° C.mB = 90°
D.mB = 180°
1 answer:
Answer:
B. m∠B = 80°
Step-by-step explanation:
Supplementary angles are two angles that sum to 180°
⇒ m∠A + m∠B = 180°
⇒ 100° + m∠B = 180°
⇒ m∠B = 180° - 100°
⇒ m∠B = 80°
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