SOLUTION: Find m∠A if m∠B = 137° and ∠A and ∠B are supplementary.

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Question 597420: Find m∠A if m∠B = 137° and ∠A and ∠B are supplementary.
Answer by AnlytcPhil(1807)   (Show Source): You can put this solution on YOUR website!
Find m∠A if m∠B = 137° and ∠A and ∠B are supplementary.

Since they are supplementary that means

m∠A + m∠B = 180°    definition of supplementary angles.

m∠A + 137° = 180°    Substituting 137° for m∠A

Subtract 137° from both sides:

       m∠A = 43°

Edwin
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