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# What is pi used for?

**Pi is used to find the circumference and area of a circle.** It is also used to find the volume and surface area of a sphere, cone and cylinder. Pi has applications that go beyond geometry as well, such as statistics and probability.

For example, it is used for calculating normal distributions and the distribution of prime numbers. It is also used in Buffon���s Needle Problem. This proof determines the probability of a needle landing on a line when it is dropped onto a plane containing equally spaced parallel lines. Pi is also prominent in geometric constructions and some formulae involving limits.

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## What does pi stand for?

A: The number pi represents the ratio of a circle's circumference to its diameter. The ratio never changes for any circle. It is approximately valued at 3.14,... Full Answer >Filed Under: -
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## Why is pi important?

A: If the circumference or the area of a circle is known, pi can be used to find the diameter and the radius of that circle. Likewise, if the radius or diamet... Full Answer >Filed Under: -
Q:
## What are some math problems for 6th grade?

A: Math problems for 6th grade include calculating surface area of cubes and rectangular prisms, solving area and circumference of a circle and area of triang... Full Answer >Filed Under: -
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## How do you calculate the diameter of a circle?

A: One can calculate the diameter of a circle mathematically if the circumference or the area of the circle is known. If the location of the center of the cir... Full Answer >Filed Under: