From an external point A

MATHEMATICS · Subjective · CBSE · Mathematics · Circles · Circles

Problem

From an external point A, tangents AB and AC are drawn to a circle with centre O. If AB = 9 cm and AO = 15 cm, find: (i) the radius of the circle, (ii) the area of triangle ABO.

Related theory

Pythagoras' Theorem
Triangle Properties
Circles
Tangent to a Circle
Tangent length properties
Tangent theorem (radius perpendicular to tangent)

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