document.write( "Question 247268: a right isosceles triangle has perimeter 12cm find its area? \n" ); document.write( "
Algebra.Com's Answer #180429 by Alan3354(69443)\"\" \"About 
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a right isosceles triangle has perimeter 12cm find its area?
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\n" ); document.write( "The sides will be s, s and s*sqrt(2)
\n" ); document.write( "2s + s*sqrt(2) = 12
\n" ); document.write( "s*(2 + sqrt(2)) = 12
\n" ); document.write( "s = 12/(2 + sqrt(2))
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\n" ); document.write( "Area = s^2/2
\n" ); document.write( "A = 144/(4 + 2 + 4sqrt(2)) = 72/(3 + 2sqrt(2))
\n" ); document.write( "A =~ 12.353 sq cm
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