Mathematics for IGCSE & O level - Circle Theorems (Section 1 - No. 19)
What is the relationship between the angle formed by a tangent and a chord at the point of contact and the angle in the alternate segment?
They are supplementary.
They are complementary.
They are equal.
They are always right angles.
Shpjegimi
The Alternate Segment Theorem states these angles are equal.