AB and AC are two tangents to a circle of radius 7cm such that AB = 7CM .

What is the length of chord BC ?

Length of tangents drawn from a common point to a circle are equal.

∴ AB = AC = 7 cm.

OB = OC = 7 cm  (radius of the circle)

As, AB = BC = OB = OC = 7 cm.

So, OBAC is a square.

BC is a diagonal of the square OBAC.

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