document.write( "Question 828839: An equilateral triangle has an altitude of 12 inches, what is the measurement of the side of the triangle? \n" ); document.write( "
Algebra.Com's Answer #499534 by TimothyLamb(4379)\"\" \"About 
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\n" ); document.write( "x = sqrt( (x/2)(x/2) + 12*12 )
\n" ); document.write( "xx = xx/4 + 144
\n" ); document.write( "(4/4)xx - (1/4)xx = 144
\n" ); document.write( "(3/4)xx = 144
\n" ); document.write( "xx = 144*(4/3)
\n" ); document.write( "x = sqrt( 144*(4/3) )
\n" ); document.write( "x = 13.856406460551018
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\n" ); document.write( "answer:
\n" ); document.write( "side = 13.9 in.
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