document.write( "Question 830068: The base of an isosceles triangle is two-fifths the length of each of the congruent sides. The perimeter of the triangle is 60 cm. How long is the base \n" ); document.write( "
Algebra.Com's Answer #501342 by jean14(9)\"\" \"About 
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perimeter is simply the sum of all sides. \r
\n" ); document.write( "\n" ); document.write( "Congruent sides have same length.\r
\n" ); document.write( "\n" ); document.write( "solve;
\n" ); document.write( "Let x be the length of the 2 congruent sides\r
\n" ); document.write( "\n" ); document.write( "2/5 x be the base length
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\n" ); document.write( "Make equation when perimeter is 60, solve for x.\r
\n" ); document.write( "\n" ); document.write( "60 = x + x + 2x/5
\n" ); document.write( "60 = 2x + 2x/5
\n" ); document.write( "60 = 2 2x/5
\n" ); document.write( "60=12x/5 multiply both sides by 5
\n" ); document.write( "5(60) = (12x/5) 5
\n" ); document.write( "300 =12x divide both sides by 12
\n" ); document.write( "300/12 = 12x/12
\n" ); document.write( "25 = x
\n" ); document.write( "The value of each congruent sides is 25cm. And the base is 2/5(25)=base
\n" ); document.write( " Then,, 50/5=10cm is the base length...\r
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\n" ); document.write( "\n" ); document.write( "Check:
\n" ); document.write( "60cm = 25cm +25cm + 2/5(25cm)
\n" ); document.write( "60cm = 50cm + 10cm
\n" ); document.write( "60cm =60cm True
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