well, you really have to add up the sides. if you have a 7 by 34 rectangle, you add up like this; 7+7+34+34. it'll be the perimiter around the shape
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Square is a special case of a rectangle and the same formula may be used to find the perimeter
yes
Add together the lengths of each side of the plane shape.
well, first you use the formula and then you do A=formula problem sloved A=n*(n) A=the answer= to n times n
to find the perimeter of a circle you simply do this (pi x D )