Geometrymedium · Past Paper
In the figure, O is the center. ABCD is a cyclic quadrilateral. If angle ABC = 95 degrees, what is the value of angle ADC?
A85 degrees
B95 degrees
C180 degrees
D265 degrees
✓ Correct Answer: A — 85 degrees
Opposite angles of a cyclic quadrilateral are supplementary. 180 - 95 = 85.
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