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OpenStudy (anonymous):

If the measure of arc BCD is 230°, what is the measure of angle BCD? 58° 40° 50° 65˚

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

arc BCD = 230, so angle BAD = 230/2 = 115 Now use the idea that opposite angles in an inscribed quadrilateral are supplementary angle BAD + angle BCD = 180 115 + angle BCD = 180 angle BCD = 180-115 angle BCD = 65

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