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It's a perfectly rounded 2 dimensional shape

It can be easily constucted with a compass

Its perimeter is better known as its circumference

Its diameter spans its circumference cutting through its centre

Its radius is half of its diameter

It can be concentric with other circles sharing the same centre

Its circumference divided by its diameter is the value of pi

Its cicumference is 2*pi*radius or diameter*pi

Its area is pi*radius squared

Its circumference touches a tangent only at a point

Its circumference is a full revolution of 360 degrees

Its lines of symmetry are infinite

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11y ago

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