Posted by Christopher on Friday, March 6, 2009 at 9:17pm.
sorry, do not understand
It is square root symbol
1/2 * 3sqrt3 * 18
27 sqrt 3
check my thinking.
so
(1/2) (3 sqrt 3) (18)?
= (3*18 * sqrt 3)/2
= 27 sqrt 3
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