Posted by kourtney on Thursday, May 12, 2011 at 3:46pm.
3*side length = 45m
each side = 45/3 = 15m
Height
= 15m * sin(60°)
= 15*(√3)/2
= 7.5√3
Area
= 15m*7.5√3 /2 m
= (225/4)√3 m²
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