Calculate the length of tangent from apoint 15 cm away from the center of the circle of radius 9cm
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We know that tangent to the circle and radius to the point of intersection of tangent and circle are perpendicular
Using Pythagoras Theorem,
15² = 9² + Tangent²
Tangent² = 225 - 81
Tangent = √144
Tangent = 12cm
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