SOLUTION: The perimeter of an equilateral triangle is 12 feet. what is the area?

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Question 621836: The perimeter of an equilateral triangle is 12 feet. what is the area?
Found 2 solutions by rfer, reviewermath:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
A=(4*4)/2
A=8 Sqft

Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
Divide the perimeter by 3 to get the measure of each side of equilateral triangle.
s = 12/3 = 4 ft.
The area of any equilateral triangle with side s is equal to s%5E2%28sqrt%283%29%29%2F4.
A+=+s%5E2%28sqrt%283%29%29%2F4
A+=+4%5E2%28sqrt%283%29%29%2F4
A+=+highlight%284sqrt%283%29%29 sq ft