document.write( "Question 180259: 6) If the sides of a dinning room are 21 feet by 18 feet, what is the length of the diagonal?
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\n" ); document.write( "7) I have 60 inches of width and have 48 inches of height in my entertainment center. I am going HDTV shopping, what is the biggest diagonal TV that I can get?\r
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Algebra.Com's Answer #135104 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
6)\r
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\n" ); document.write( "\n" ); document.write( "If we cut the table along the diagonal, we'll have this triangle set up:\r
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\n" ); document.write( "\n" ); document.write( "Since the legs are \"18\" and \"21\" this means that \"a=18\" and \"b=21\"\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( "\"18%5E2%2B21%5E2=x%5E2\" Plug in \"a=18\", \"b=21\", \"c=x\" \r
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\n" ); document.write( "\n" ); document.write( "\"324%2B21%5E2=x%5E2\" Square \"18\" to get \"324\".\r
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\n" ); document.write( "\n" ); document.write( "\"324%2B441=x%5E2\" Square \"21\" to get \"441\".\r
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\n" ); document.write( "\n" ); document.write( "\"765=x%5E2\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2=765\" Rearrange the equation.\r
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\n" ); document.write( "\n" ); document.write( "\"x=sqrt%28765%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=3%2Asqrt%2885%29\" Simplify the square root.\r
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\n" ); document.write( "\n" ); document.write( "\"x=27.659\" Use your calculator to evaluate and simplify\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 approximately \"x=27.659\" which means that the diagonal is about 27.659 feet\r
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\n" ); document.write( "\n" ); document.write( "Again, if we cut the TV in half along the diagonal we'll have this triangle set up:\r
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\n" ); document.write( "\n" ); document.write( "Since the legs are \"48\" and \"60\" this means that \"a=48\" and \"b=60\"\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( "\"48%5E2%2B60%5E2=x%5E2\" Plug in \"a=48\", \"b=60\", \"c=x\" \r
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\n" ); document.write( "\n" ); document.write( "\"2304%2B60%5E2=x%5E2\" Square \"48\" to get \"2304\".\r
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\n" ); document.write( "\n" ); document.write( "\"2304%2B3600=x%5E2\" Square \"60\" to get \"3600\".\r
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\n" ); document.write( "\n" ); document.write( "\"5904=x%5E2\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2=5904\" Rearrange the equation.\r
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\n" ); document.write( "\n" ); document.write( "\"x=sqrt%285904%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=12%2Asqrt%2841%29\" Simplify the square root.\r
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\n" ); document.write( "\n" ); document.write( "\"x=76.837\" Evaluate the square root of 41 and multiply\r
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\n" ); document.write( "\n" ); document.write( "Now round down (to the nearest inch) to get \"x=76\"\r
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\n" ); document.write( "\n" ); document.write( "So this tells us that the largest diagonal TV would be 76 inches\r
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\n" ); document.write( "\n" ); document.write( "Note: you can ignore rounding, but keep in mind that the \".837\" portion would need to be converted
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