document.write( "Question 1132555: QT and PM are altitude of ∆PQR. If |QR| = 8cm, |PR| = 7cm and QT = 4cm, what is |PM|
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Algebra.Com's Answer #749627 by ikleyn(52907)\"\" \"About 
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document.write( "QR is the side with the altitude PM.\r\n" );
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document.write( "PR is the side with the altitude QT.\r\n" );
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document.write( "You can calculate the area of the triangle PQR by two ways.\r\n" );
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document.write( "One way is      Area = \"1%2F2\".\"abs%28QR%29\".\"abs%28PM%29\".\r\n" );
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document.write( "Another way is  Area = \"1%2F2\".\"abs%28PR%29\".\"abs%28QT%29\".\r\n" );
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document.write( "Since the area is the same, it gives you an equation\r\n" );
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document.write( "    \"1%2F2\".\"abs%28QR%29\".\"abs%28PM%29\" = \"1%2F2\".\"abs%28PR%29\".\"abs%28QT%29\",   or   \"abs%28QR%29\".\"abs%28PM%29\" = \"abs%28PR%29\".\"abs%28QT%29\".\r\n" );
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document.write( "Hence,  |PM| = \"%28abs%28PR%29%2Aabs%28QT%29%29%2Fabs%28QR%29\" = \"%287%2A4%29%2F8\" = 3.5 cm.     ANSWER\r\n" );
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