In the given figure

MATHEMATICS · Subjective · CBSE · Mathematics · Circles · Circles

Problem

In the given figure, the radii of two concentric circles are 13 cm and 8 cm. AB is diameter of the bigger circle. BD is the tangent to the smaller circle touching it at D. Find the length AD.

Related theory

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

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