you add up the distance of all the sides
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Perimeter and area are not sufficient to determine the shape of a figure.
You find perimeter by adding all the sides of a figure.
-- Measure or figure out the length of each side. -- Add up all the lengths of all the sides. -- The answer is the perimeter of the shape.
no If the shape of the object is not fixed, it would be possible to alter the shape of the perimeter, but not the length, i.e., the distance around the object being enclosed.
It's undefined, because we dont know the shape of the figure. If it's a square, the perimeter is 12.. if its a rectangle the perimeter MIGHT be 20... We cant determine if we dont know the figure.