SOLUTION: How do I get the area of a triangle if the perimeter is 21m thank you

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Question 334412: How do I get the area of a triangle if the perimeter is 21m thank you
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
You need more information. Are you told this is an equalateral triangle? Given a picture? You need more info before you can answer this question.