alleryA point is 13 cm from the centre of a circle of radius 5 cm. How long is the tangent from it?
A12 cm
B8 cm
C14 cm
D18 cm
Answer & Solution
Correct answer: A. 12 cm
The tangent is perpendicular to the radius, so its length is the square root of 169 - 25 = 144, i.e. 12 cm.
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