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How do you find the volume of a circle?

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Calculate the volume of a cylinder with a length of 20cm, and whose circular end has a radius of 2.5cm. First, work out the area of one of the circular ends of the cylinder. The area of a circle is ?r2 (? × radius × radius). ? (pi) is approximately 3.14. read more

Volume of a Sphere. As with a circle, you need π (pi) to calculate the volume of a sphere. The formula is 4/3 × π × radius 3. You may be wondering how you could work out the radius of a ball. Short of sticking a knitting needle through it (effective, but terminal for the ball!), there is a simpler way. read more

The circle's diameter, in turn equals twice the radius. A regular solid that has a circle as a face is called a cylinder. Like all geometric prisms, a cylinder's volume is the product of its cross-sectional area and its length. The cross-sectional area is the area of its circle, and you can calculate it from the circle's radius. read more

Formulas for Circle Circumference, Circle Area, Sphere Area, Partially Filled Sphere Area, Partially Filled Sphere Volume, Sphere Volume, Cylinder Area, Cylinder Volume read more

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