document.write( "Question 394686: If PQ = 21 cm and QR = 5 cm, then what are the possible lengths for PR so that PQ, QR , and PR can form a triangle? Explain your reasoning. \n" ); document.write( "
Algebra.Com's Answer #280083 by richard1234(7193)\"\" \"About 
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The sum of any two sides must be longer than the third side. This means,\r
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\n" ); document.write( "\"PQ+%2B+QR+%3E+PR\" --> \"21+%2B+5+%3E+PR\" --> \"PR+%3C+26\"\r
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\n" ); document.write( "\n" ); document.write( "\"QR+%2B+PR+%3E+PQ\" --> \"5+%2B+PR+%3E+21\" --> \"PR+%3E+16\"\r
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\n" ); document.write( "\n" ); document.write( "The last inequality, \"PQ+%2B+PR+%3E+QR\" is already implied as \"PQ+%3E+QR\" so this doesn't limit PR.\r
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\n" ); document.write( "\n" ); document.write( "Putting the inequalities together, we have \"16+%3C+PR+%3C+26\".
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