document.write( "Question 1099385: the length of a tangent from a point A at distance 5cm from the center of the circle is 4 cm.Find the radius of the circle \n" ); document.write( "

Algebra.Com's Answer #713829 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "The tangent line and the radius to the tangent point are perpendicular.\r\n" );
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document.write( "Together with the line connecting the given point with the center, they make a right angled triangle.\r\n" );
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document.write( "Its hypotenuse is 5 cm and one leg is 4 cm.\r\n" );
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document.write( "Hence, the other leg is 3 cm (3-4-5 right angled triangle), and this leg is the radius.\r\n" );
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document.write( "Answer.  The radius of the circle is 3 cm.\r\n" );
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