Circles

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The circumference of a circle is the distance around the circle. The circumference depends on the distance across the circle; the diameter.

The distance across a circle is called diameter. A diameter must pass through the center of the circle.

The radius is half of the diameter. d/2 = r

To find the area of a circle.

Area of a circle =

To find the circumfernece you just times the diameter by pie. And don't forget that the diameter in just 2 x r

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