# Among these figures circle, square, rectangle, isosceles triangle which has the greatest perimeter had the same area?

Among these figures circle, square, rectangle, isosceles triangle which has the greatest perimeter had the same area geometrically ?

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As it stands, this question doesn't have a definitive answer. Given any area, you can make a rectangle or isosceles triangle having that area, with arbitrarily large perimeter.

Now, if the question were asking which can have the greatest area given a perimeter, then it would be more interesting (and the answer would be a circle).

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