document.write( "Question 290266: Find the length of side a in the right triangle, if b = 4 and c=5.\r
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Algebra.Com's Answer #210041 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
3,4, 5 is a classic right triangle.
\n" ); document.write( "You should know it and 5,12,13
\n" ); document.write( "otherwise x^2+4^2=5^2
\n" ); document.write( "x^2+16=25
\n" ); document.write( "x^2=9
\n" ); document.write( "x=3
\n" ); document.write( "reject neg root
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