CBSE · Class 6-12

Back to Circles

Class 10 · Mathematics (Standard) · Unit 10: Circles

Angle Between Tangents

Lesson 5 of 6

If two tangents from an external point

P

touch the circle at

A

and

B

, then

\angle APB + \angle AOB = 180^\circ

(where

O

is the centre). The line

OP

bisects both angles

\angle APB

and

\angle AOB

.

Length of Tangent

Common Tangents to Two Circles

All lessons in this unit