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.
Giải thích
Tangents drawn from an external point to a circle are always equal in length.