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Can someone help me on this​

Can someone help me on this​-example-1
User Hhaamu
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1 Answer

4 votes

Answer:

m∠A = 91°

Explanation:

∠A ≅ ∠B (Vertical Angle Theorem). This means that the two angles will have the same measurements.

Note that a straight line = 180° (Definition of a Straight Line).

Find the value of m∠B.

180 - 47 - 42 = m∠B

m∠B = 180 - (89)

m∠B = 91°

Remember that ∠B & ∠A are vertical angles, so they will have the same measurement.

m∠A = 91°

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User Sergej Lopatkin
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