Mathematics for IGCSE & O level - Circle Theorems (Section 3 - No. 13)
What do we know about the relationship between the lengths of tangents drawn from an external point to a circle?
They are always different.
They are always equal.
They are sometimes equal.
They are not related to the center of the circle.
解释
Tangents drawn from an external point to a circle are always equal in length.