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OpenStudy (anonymous):
if a side-length of an equilateral triangle is 18, which is its area?
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OpenStudy (anonymous):
18*18/2
OpenStudy (e.mccormick):
All triangles have \frac{1}{2}bh as their area. In an equilateral triangle, b is the measure of any side. The height can be found using right triagle properties... and it is not 18 for this one. |dw:1369158417685:dw|
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