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The ratio of any two lines in any picture is unchanged when you change the size of the picture. In the case of a circle, the ratio of circumference to diameter is called pi simply because pi has turned out to be a useful number in many applicaions.

Q: How did mathematician figured out that the formula for circumference of a circle?

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The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.

Formula of Circumference of a circle: 3.14*Diameter of the circle. You could also do: 3.14*3.14*radius.

The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.

Circumference of a circle = 2*pi*radius

A simple formula to calculate the circumference of a circle: so in this case:

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Archimedes, a famous Greek mathematician.

Archimedes, a famous Greek mathematician, born about 287 B.C.

In order to convert the area of a circle to the circumference of the circle, divide by the radius and multiply by two. The formula for the circumference of a circle is pi times the diameter.

The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.

There is no circumference of a cone, but, we only do the circumference of the circle. the formula for the circle is pi times D. D= Diameter

Formula of Circumference of a circle: 3.14*Diameter of the circle. You could also do: 3.14*3.14*radius.

If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi

The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.

There is a constant relationship between the radius of a circle and its circumference. This is expressed in a formula.

Circumference of a circle = 2*pi*radius

Formula: diameter = pi / circumference

The formula for the circumference of a circle is: radius (x) 3.14 (pi) Area is... Radius2 x 3.14