Question

The length of a tangent from a point A at a distance of 13 cm from the centre of the circle 12 cm. Find the radius of the circle
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Answer 1

Answer:

(Tangent)² + (Radius)² = (Point of Distance) ²

(Radius)² = (Point of Distance) ² - (Tangent)²

(Radius)² = (13)² - (12)²

(Radius)² = 169 - 144

(Radius)² = 25

Radius = 5cm