O is the centre of a circle of radius 5 cm. t is a point such that ot=13 cm and ot intersects the circle at
e.if ab is a tangent to the circle at e, find the length of ab.
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By Pythagoras theorem the length of the tangent an is 12 cm. (13^2-5^2)=169-25 is 144 and The square root of 144 is 12.
mammuthaj:
12 i tp not ab
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