document.write( "Question 745312: three circles are stacked. 3 on the bottom row. Two on the 2nd row. and One on the top. Find the height of the stack if the radius of the circles are 10 cm \n" ); document.write( "
Algebra.Com's Answer #453823 by KMST(5328)\"\" \"About 
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The red triangle is an equilateral triangle with side length 40cm (4 circle radii). Its height is the length of the altitude drawn in green:
\n" ); document.write( "\"%2810cm%29%2Asin%2860%5Eo%29=%2810cm%29%2A%28sqrt%283%29%2F2%29=about34.64cm\" (rounded)
\n" ); document.write( "To get the height of the whole stack, we have to add one circle radius below that altitude, and one circle radius above the altitude for a total length of
\n" ); document.write( "\"10cm%2B34.64cm%2B10cm=highlight%2854.64cm%29\"
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