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:
(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
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