document.write( "Question 330733: A triangle has a perimeter of 84 inches. its shortest side measures 9 inches shorter than its middle side,and its longest side measures 6inches longer than its middle side. find the lengths of the triangle three sides \n" ); document.write( "
Algebra.Com's Answer #237115 by dewasmaharaja(5)![]() ![]() ![]() You can put this solution on YOUR website! Let three sides of the triangle be \n" ); document.write( "l for long \n" ); document.write( "m for middle \n" ); document.write( "s for short\r \n" ); document.write( "\n" ); document.write( "Then, \n" ); document.write( "l + m + s = 84 ...(a) \n" ); document.write( "s = m - 9 ...(b) \n" ); document.write( "l = m + 6 ...(c)\r \n" ); document.write( "\n" ); document.write( "Substituting equation (b) and (c) in (a),\r \n" ); document.write( "\n" ); document.write( "m - 9 + m + m + 6 = 84\r \n" ); document.write( "\n" ); document.write( "3m = 87 \n" ); document.write( "Therefore, m = 87/3 = 29\r \n" ); document.write( "\n" ); document.write( "From (b), s = 29 - 9 = 20 \n" ); document.write( "From (c), l = 29 + 6 = 35 \n" ); document.write( " |