document.write( "Question 427376: A chord 24 inches long is 5 inches from the center of a circle. What is the radius of the circle to the nearest tenth of an inch? Please explain how you go the answer because I don't understand this question at all. \n" ); document.write( "
Algebra.Com's Answer #297208 by sudhanshu_kmr(1152)\"\" \"About 
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\n" ); document.write( "Chord and two radius joining the endpoint of chord and center form an isosceles triangle.\r
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\n" ); document.write( "\n" ); document.write( "the line joining the center and midpoint of chord form a right angle on chord.\r
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\n" ); document.write( "\n" ); document.write( "by Pythagoras theorem.\r
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\n" ); document.write( "\n" ); document.write( "( half of chord)^2 + (distance between chord and center)^2 = radius^2\r
\n" ); document.write( "\n" ); document.write( "=> (12)^2 + 5^2 = radius^2\r
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\n" ); document.write( "\n" ); document.write( "=> radius ^2 = 169\r
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\n" ); document.write( "\n" ); document.write( "so, radius = 13 inches.\r
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