Circumference, not perimeter


just something I noticed... refers to it as the "perimeter" of a circle, but the term is circumference... it tripped me up a little \:


A circumference is a special case, but it is in fact still a perimeter. A perimeter is defined as the total length along the outside of a polygon or a curve that closes back on itself. All shapes have a perimeter, but only a circle or ellipse can have a circumference.


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