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# What is the volume of a circle?

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A circle does not have a volume. The volume of an object is the measurement of how much an object holds. It is a cubic measurement and does not apply to two-dimensional objects such as circles.

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The formula for determining volume varies with the shape of the object. A cylinder that has a circular base has volume because it is three dimensional. The formula for determining its volume is pi times the radius of the circular base squared times the height of the cylinder. The area of a circle is found by the formula pi times the radius squared. Pi is equal to approximately 3.14, and the radius is half of the circle's diameter.

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## Related Questions

• A:

There are different ways to find the diameter of a circle depending on what information you start with. If you know the circumference of the circle, divide the circumference by pi to find the diameter.

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It was the Babylonians who first divided the circle into 360 degrees in order to integrate the geometry they developed with the 360-day calendar then in use. The Babylonians devised a counting system based not on units of 10 but on units of 60, which can be counted to on the 12 knuckles of one hand and the five fingers of the other.

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A circle is actually a special kind of ellipse where the two focuses are equal. Every ellipse contains two points called a focus. The perimeter of the ellipse is the group of points, which are equally distant from these two focuses.