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In the figure, PA is tangent to semicircle SAR, PB is tangent to semicircle RBT, and SRT is a straight line. If arc AC is 51 degrees and arc BT is 31 degrees, then find APB, in degrees.

 

 Dec 5, 2020
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Angle APB = 540 - (129 + 90 + 90 + 149) = 82 degrees

 Dec 5, 2020

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