The word "circumference" is used for circles and circular shapes, such as ellipses and ovals. For other plane shapes, the word used is perimeter.
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Circumference is only used for circles. Perimeter is for every other 2D shape.
It is a circle's circumference and the exterior angles of any polygon add up to 360 degrees.
circumference of a circle = 2*pi*radius or diameter*pi
Nothing. They mean the same thing. Except in English, the word circumference is reserved for circles.I think for other strictly curved, enclosed shapes (I believe ellipses also have circumferences), but dont quote me.But otherwise any shape with a circumference also has an equivalent perimeter. Its just a word.
They are not the same except that they relate to plane shapes. The circumference is a one-dimensional measure of the boundary of a shape while the area is the two-dimensional measure of its coverage.