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Pi (π) is the ratio of the diameter of circle to its circumference that is used to calculate with circles. Pi=3.14...

The exact value of pi is not known although it has been calculated to several million decimal places.

Pi is used for finding a circumference and area of a circle, the volume and surface area of a cylinder, and many other things.

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9y ago
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13y ago

circumference = diameter x pi

area = pi x radius squared

pi = 3.14159265358979323846264338327950288419716939937510

answ2. Pi is an irrational number, the ratio of the circumference of a circle to its radius. It is universally used in matters circular.

Some people use the computation of pi to a certain number of digits to compare 'computing power' of computers.

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Q: What is the uses of pi?
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