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28 July, 05:28

In ABC, if mA = 81° and mC = 27°, then find m

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  1. 28 July, 08:45
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    If ABC is a Triangle which it likely is because it has ABC naming 3 vertices

    mA = 81° and mC = 27° and MB is unknown

    all triangles add to 180 degrees

    so 180 - (81 + 27) = mB

    180 - 108 = mB

    72 = mB
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