document.write( "Question 179419: Find the unknown side of the right triangle. Round to the nearest thousandths. One side is 9yd, the other side is 12 yd. \n" ); document.write( "
Algebra.Com's Answer #134345 by jim_thompson5910(35256)\"\" \"About 
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I'm assuming that the missing side is the hypotenuse.\r
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\n" ); document.write( "\n" ); document.write( "So we basically have this triangle set up:\r
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\n" ); document.write( "\n" ); document.write( "Since the legs are \"9\" and \"12\" this means that \"a=9\" and \"b=12\"\r
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\n" ); document.write( "\n" ); document.write( "Also, since the hypotenuse is \"x\", this means that \"c=x\".\r
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\n" ); document.write( "\n" ); document.write( "\"a%5E2%2Bb%5E2=c%5E2\" Start with the Pythagorean theorem.\r
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\n" ); document.write( "\n" ); document.write( "\"9%5E2%2B12%5E2=x%5E2\" Plug in \"a=9\", \"b=12\", \"c=x\" \r
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\n" ); document.write( "\n" ); document.write( "\"81%2B12%5E2=x%5E2\" Square \"9\" to get \"81\".\r
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\n" ); document.write( "\n" ); document.write( "\"81%2B144=x%5E2\" Square \"12\" to get \"144\".\r
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\n" ); document.write( "\n" ); document.write( "\"225=x%5E2\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2=225\" Rearrange the equation.\r
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\n" ); document.write( "\n" ); document.write( "\"x=sqrt%28225%29\" Take the square root of both sides. Note: only the positive square root is considered (since a negative length doesn't make sense).\r
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\n" ); document.write( "\n" ); document.write( "\"x=15\" Simplify the square root.\r
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\n" ); document.write( "\n" ); document.write( "Answer:\r
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\n" ); document.write( "\n" ); document.write( "So the solution is \"x=15\" which means that the length of the missing side is 15 yards.
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