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The Area and Perimeter of a Circle

A circle is defined by its diameter or radius. The Area and Perimeter of a Circle. The perimeter or circumference of a circle is the distance around the outside. radius. The area of a circle is the space inside it. Diameter. The ratio of π (pi).

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The Area and Perimeter of a Circle

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  1. A circle is defined by its diameter or radius The Area and Perimeter of a Circle The perimeter or circumference of a circle is the distance around the outside radius The area of a circle is the space inside it Diameter The ratio of π (pi) The circumference is found using the formula C=π d or C= 2πr (since d=2r) The area is found using the formula C=πr2

  2. A circle is defined by its diameter or radius The Area and Perimeter of a Circle The perimeter or circumference of a circle is the distance around the outside radius The area of a circle is the space inside it Diameter The ratio of π (pi) The circumference is found using the formula C=π d or C= 2πr (since d=2r) The area is found using the formula C=πr2

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