document.write( "Question 136841: The perimeter of an isosceles triangle is 30 cm. Which of the following cannot be the
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document.write( "A. 1 cm B. 5 cm C. 9 cm D. 15 cm
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Algebra.Com's Answer #100144 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! The perimeter of an isosceles triangle is 30 cm. Which of the following cannot be the \n" ); document.write( "length of the base? \n" ); document.write( "A. 1 cm B. 5 cm C. 9 cm D. 15 cm \n" ); document.write( "-------------------------------------- \n" ); document.write( "Let \"x\" be the length of the two equal sides: \n" ); document.write( "EQUATION: \n" ); document.write( "x+x+ b = 30 \n" ); document.write( "2x + b = 30 \n" ); document.write( "2x = 30-b \n" ); document.write( "-------------------- \n" ); document.write( "Try the various possible values of the base: \n" ); document.write( "Can b=1cm ?: 2x = 29; x = 14.5 cm \n" ); document.write( "---------------- \n" ); document.write( "Can b=5cm ?: 2x = 25; x 12.5 \n" ); document.write( "---------------- \n" ); document.write( "Can b=9cm ? ; 2x = 21; x=10.5 \n" ); document.write( "---------------- \n" ); document.write( "Can b=15cm ? ; 2x = 15; x = 7.5 \n" ); document.write( "----------------- \n" ); document.write( "Draw an isosceles with base = 15 and each equal side = 7.5. \n" ); document.write( "Notice you do not have a triangle if you draw it correctly. \n" ); document.write( "===================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |