Mathematics for IGCSE & O level - Circle Theorems (Section 1 - No. 43)
In a cyclic quadrilateral, angle A is 110 degrees. What is the measure of its opposite angle C?
70 degrees
90 degrees
110 degrees
250 degrees
ব্যাখ্যা
Opposite angles in a cyclic quadrilateral are supplementary (add up to 180 degrees).