What must be the measures of angle B and angle C so that

a circle can be circumscribed about ABCD? Angle A is 103 degrees Angle D is 78 degrees
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1 Answer

I guess you have a cyclic quadrilateral ABCD, where A and D are opposite angles to C and B. Such angles are supplementary, that is, their sum is 180°. Therefore C measures 180-103=77° and B measures 180-78=102°.

by Top Rated User (1.2m points)

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