a circle
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a shape with equal sides
The distance around a two dimensional shape is known as the perimeter of the shape. If the shape is circular, it may be refered to as a circumference.
error in shape,size,or distance
Circumference. If you have a rectangle, then the circumference (length of the sides) is equal to 2*height + 2*width.
A cube is a 3D shape that has 6 faces of equal area.