document.write( "Question 612386: A right triangle has a hypotenuse of length 25 and a leg of length 20. What is the length of the right leg? If necessary, round your answer to two decimal places. \n" ); document.write( "
Algebra.Com's Answer #385414 by vleith(2983)\"\" \"About 
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Use the Pythagorean theorem
\n" ); document.write( "\"a%5E2+%2B+b%5E2+=+c%5E2\"
\n" ); document.write( "\"20%5E2+%2B+b%5E2+=+25%5E2\"
\n" ); document.write( "\"400+%2B+b%5E2+=+625\"
\n" ); document.write( "\"b%5E2+=+625-400\"
\n" ); document.write( "\"b%5E2+=+225\"
\n" ); document.write( "\"b+=15\"\r
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\n" ); document.write( "\n" ); document.write( "You will notice that the sides are in a ratio of 15:20:25
\n" ); document.write( "Which is 3:4:5
\n" ); document.write( "Any triangle in ratio 3:4:5 is a right triangle.
\n" ); document.write( "That comes up a lot, so you might want to memorize that.
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