A straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
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What is circumference?
The surrounding perimeter of a circle
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What is the approximation of pi?
3.14
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How do you find the surface area?
2πrh+2πr2
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How do you find the volume?
You would use the following formula: PiR^2H
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How do you find the diameter?
You double the radius.
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How do you find circumference?
2PiR
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What is the ratio of pi?
Pi is the ratio of the circumference to the diameter.
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Find the surface area of the following: a cylinder with 4 cm radius, and a height of 6 cm.
251.2 cm^2
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What is the volume for a cylinder with a radius of 4 inches, and 9 inches height.
425.16 inches ^3
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Find the diameter with a radius of 14.6 cm
The diameter is 29.2 cm
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Find the circumference when the radius is 4 cm.
The circumference is: 25.12 cm.
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Why would you use pi?
Pi is often used when calculating the formula for surface area and volume. It also shows the ratio between the circumference, and the diameter of a circle.