document.write( "Question 870883: The side length of an equilateral triangle is 6 cm. What is the height of the triangle? \n" ); document.write( "
Algebra.Com's Answer #525214 by JulietG(1812)\"\" \"About 
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Think of the triangle as two right triangles put together back to back -- each of those triangles would have a hypotenuse of 6 and a base of 3. You're looking for the third leg.
\n" ); document.write( "\"3%5E2+%2B+x%5E2+=+6%5E2\"
\n" ); document.write( "9 + \"x%5E2\" = 36
\n" ); document.write( "Subtract 9 from each side
\n" ); document.write( "\"x%5E2\"=25
\n" ); document.write( "sq rt each side
\n" ); document.write( "x = 5
\n" ); document.write( ".
\n" ); document.write( "The height is 5.
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