document.write( "Question 955043: What is the area of an equilateral triangle whose perimeter is 28 in? \n" ); document.write( "

Algebra.Com's Answer #583374 by Fombitz(32388) $\"\"$ $\"About$

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You can calculate the height of the triangle,
\n" ); document.write( " $\"S%5E2=%28S%2F2%29%5E2%2BH%5E2\"$
\n" ); document.write( " $\"%2828%2F3%29%5E2=%28%281%2F2%29%2828%2F3%29%29%5E2%2BH%5E2\"$
\n" ); document.write( " $\"H%5E2=%2828%5E2-28%5E2%2F4%29%2F3%5E2\"$
\n" ); document.write( " $\"H%5E2=%283%2F4%29%2828%2F3%29%5E2\"$
\n" ); document.write( " $\"H=%28sqrt%283%29%2F2%29%2828%2F3%29\"$
\n" ); document.write( "So then the area is,
\n" ); document.write( " $\"A=%281%2F2%29%2828%2F3%29%28sqrt%283%29%2F2%29%2828%2F3%29\"$
\n" ); document.write( " $\"A=%28196%2F9%29sqrt%283%29\"$ $\"in%5E2\"$ \n" ); document.write( "

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