denisse013
denisse013
29-06-2017
Mathematics
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jimthompson5910
jimthompson5910
29-06-2017
This is an inscribed quadrilateral. The opposite angles are supplementary. They add to 180 degrees.
angleB + angleD = 180
93 + x+30 = 180
x+123 = 180
x+123 = 180-123
x = 57
Answer is choice C
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