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20 March, 07:40

Angles A and B are supplementary. Angle A has a measure of 80°. What is the measure of angle B?

The measure of angle B is

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  1. 20 March, 08:01
    0
    Supplementary angles: sum of the angles measure to be 180º

    180º-A = B

    Plug in ...

    180º-80º = 100º

    So, angle B must be 100 degrees.
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