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Q: Why is pi used in circle?

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Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle

By definition Pi is the relation between the radius and circumference of a circle.

It is used to find the area of a circle as pi*radius2

Pi is used to find area and circumference of a circle.

the way to use pi is to find the circuference of a circle

Pi can be used to find a circle, For the circumference-Pi x D, or for the radius Pi x r2

To find out the area of a circle.

It is a Greek letter used to represent the ratio of the diameter of a circle to its circumference so you can see 'pi' (not a pi)in any circle.

Area of a circle equals pi (3.14) times the radius squared.

well pi is used to find the area of a circle A=pi x the radius squared

Pi is used in nearly every branch of math. If you need to do anything with a circle, pi was used to make that circle. Any measurement of a circle, cylinder, sphere, etc involves pi. Pi is incorporated into the GPS. All kinds of things use pi. A fun fact for pi: the actual length of a river compared to the straight distance from source to mouth will yield pi.

pi is the # 22 divided by 7. it is used to find a circle's circumfernce

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