SOLUTION: find the area of an equilateral triangle with a perimeter of 54 cm. can you help me please?

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Question 1115409: find the area of an equilateral triangle with a perimeter of 54 cm.

can you help me please?
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
The area of an equilateral triangle is related to its side-length, s, by: +A+=++%28sqrt%283%29%2F4%29%2As%5E2+
The value of s = 54cm/3 = 18cm. Plug in 18 to find +A+=+81%2Asqrt%283%29+cm%5E2+ or about 140.296cm%5E2
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EDITED to actually square s, sorry about that.