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Q: What are the two formulas for circumference?

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circumference: Pi(3.14) x radius squared Diameter: radius squared radius: diameter divided by 2

Angular measure of a circle: 2*pi radians. Circumference of a circle with diameter d units: d*pi units

The formula for the circumference of a circle is 2.pi.r where r= the radius, since the diameter is 2.r (two times the radius),the circumference will be pi.diameter. pi=3.14159... so for a diameter of 34mm the circumference=pi.34=106.8mm

For a circle the diameter can be found by dividing the circumference by pi. Once the diameter is found by squaring the radius multiplied by pi. For a cylinder follow the previous method and multiply the answer by two. Multiply the circumference of the circle by the cylinder height. Add the two answers together.

A chord is a straight line joining two points on the circumference of a circle.

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They are: 2*pi*radius or as diameter*pi

C=Pi*D

Pi = circumference/diameter

The circumference of a circle with a diameter of two is about 6.28

Here is the two formulas *= pie=3.14 Radius C=r2* Diameter C=d*

It is important to know formulas of pi for circles like areas of a circle and its circumference

Area= square the radius and times it by pie

They both depend on circumference not perimeter.

The circumference also doubles.

The radius is the circumference divided by pie, all divided by two. :)

The circumference of a circle is two times pi times the radius.

circumference: Pi(3.14) x radius squared Diameter: radius squared radius: diameter divided by 2

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