document.write( "Question 12090: what is the height of an equilateral triangle whose sides are each 18cm long? \n" ); document.write( "
Algebra.Com's Answer #6134 by Pieter(35)\"\" \"About 
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hi,\r
\n" ); document.write( "\n" ); document.write( "when you apply some goniometrics it is very simple!
\n" ); document.write( "All you have to do is cut the triangle into 2 pieces, two traingles with one angle of 90°. In one of these triangles you can apply simple goniometry:\r
\n" ); document.write( "\n" ); document.write( "h=18*cos(60°)\r
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