Mathematics for IGCSE & O level - Circle Theorems (Section 2 - No. 2)
What relationship exists between opposite angles of a cyclic quadrilateral?
They are equal.
They are supplementary.
They are complementary.
They are in a ratio of 1:2.
הֶסבֵּר
Opposite angles of a cyclic quadrilateral are supplementary (sum to 180 degrees).