document.write( "Question 949469: in a right triangle the length of the longer leg is 2 centimeters more than twice the length of the shorter leg. the length of the hypotenuse is 8 centimeters more than the length of the shorter leg. find in centimeters the length of the 3 sides of the triangle \n" ); document.write( "
Algebra.Com's Answer #579655 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "let the hypotenuse be \"c\",the longer leg \"a\" and the shorter leg \"b\"\r
\n" ); document.write( "\n" ); document.write( "we know that in a right triangle \"c%5E2=a%5E2%2Bb%5E2\".....eq.1\r
\n" ); document.write( "\n" ); document.write( "given:
\n" ); document.write( "in a right triangle the length of the longer leg \"a\" is \"2cm\" more than twice the length of the shorter leg \"b\", then we have\r
\n" ); document.write( "\n" ); document.write( " \"a=2b%2B2cm\"\r
\n" ); document.write( "\n" ); document.write( "the length of the hypotenuse \"c\"is \"8cm\" more than the length of the shorter leg \"b\", then we have
\n" ); document.write( "\"c=b%2B8cm\" \r
\n" ); document.write( "\n" ); document.write( "go to \"c%5E2=a%5E2%2Bb%5E2\".....eq.1, substitute \"a\" and \"c\"\r
\n" ); document.write( "\n" ); document.write( "\"%28b%2B8cm%29%5E2=%282b%2B2cm%29%5E2%2Bb%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"cross%28b%5E2%29%2B16b%2Acm%2B64cm%5E2=4b%5E2%2B8b%2Acm%2B4cm%5E2%2Bcross%28b%5E2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"16b%2Acm%2B64cm%5E2=4b%5E2%2B8b%2Acm%2B4cm%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"0=4b%5E2-16b%2Acm%2B8b%2Acm%2B4cm%5E2-64cm%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"4b%5E2-8b%2Acm-60cm%5E2=0\"....simplify, divide by \"4\"\r
\n" ); document.write( "\n" ); document.write( "\"b%5E2-2b%2Acm-15cm%5E2=0\"...factor completely, replace \"-2b%2Acm\" with \"-5b%2Acm%2B3b%2Acm\"\r
\n" ); document.write( "\n" ); document.write( "\"b%5E2-5b%2Acm%2B3b%2Acm-15cm%5E2=0\"...group\r
\n" ); document.write( "\n" ); document.write( "\"%28b%5E2-5b%2Acm%29%2B%283b%2Acm-15cm%5E2%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"b%28b-5cm%29%2B3cm%28b-5cm%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%28b-5cm%29%28b%2B3cm%29+=+0\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "if
\n" ); document.write( "\"%28b-5cm%29+=+0\"=>\"b=5cm\"
\n" ); document.write( "if
\n" ); document.write( "\"%28b%2B3cm%29+=+0\"=>\"b=-3cm\"..-> disregard negative value because we are looking for the length\r
\n" ); document.write( "\n" ); document.write( "so, our solution is \"highlight%28b=5cm%29\"\r
\n" ); document.write( "\n" ); document.write( "now find \"a\" and \"c\"\r
\n" ); document.write( "\n" ); document.write( "\"a=2b%2B2cm\"=>\"a=2%2A5cm%2B2cm\"=> \"highlight%28a=12cm%29\"\r
\n" ); document.write( "\n" ); document.write( "\"c=b%2B8cm\"=>\"c=5cm%2B8cm\"=>\"highlight%28c=13cm%29\"\r
\n" ); document.write( "\n" ); document.write( "check if Pythagoras theorem works:\r
\n" ); document.write( "\n" ); document.write( "\"c%5E2=a%5E2%2Bb%5E2\"
\n" ); document.write( "\"%2813cm%29%5E2=%2812cm%29%5E2%2B%285cm%29%5E2\"
\n" ); document.write( "\"169cm%5E2=144cm%5E2%2B25cm%5E2\"
\n" ); document.write( "\"169cm%5E2=169cm%5E2\"............true; so, these are sides of right angle triangle\r
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