If 9 cm and 25 cm be the radious of two circle which touches each other at a common point . Find the length of common tangent.
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Answer:
given radius = 9cm,25cm
length of tangent = ?
by Pythagoras therom
hypotenuse square = side square + sidesquare
bc square= 9 square + 25 square
=81+625
√706
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