document.write( "Question 826800: How do you find the area of an equilateral triangle if the perimeter is 18cm? \n" ); document.write( "
Algebra.Com's Answer #498263 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
each side is 6
\n" ); document.write( "drop a line from the top angle to the base forming a right triangle with base 3 and hypotenuse 6
\n" ); document.write( "and the height is 3 sqrt(3)\r
\n" ); document.write( "\n" ); document.write( "3^2+h^2=36
\n" ); document.write( "h^2=27
\n" ); document.write( "h^2=3*9
\n" ); document.write( "h=3sqrt(3)
\n" ); document.write( "1/2 b*h=1/2*3*3*sqrt(3)
\n" ); document.write( "9/2 sqrt(3)\r
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