# Circumference to diameter

## Circumference to Diameter

To convert the circumference (C) of a circle to its diameter (d), you can use the following formula:

**d = C / π**

where π (pi) is a mathematical constant approximately equal to 3.14159.

To use this formula, simply input the value of the circumference into the formula and solve for the diameter. For example, if the circumference of a circle is 25 centimeters, the diameter of the circle would be:

**d = C / π d = 25 / 3.14159 d = 7.9577 cm**

Therefore, the diameter of the circle with a circumference of 25 centimeters is approximately 7.9577 centimeters (rounded to four decimal places).

## Circumference

The circumference of a circle is the distance around its edge or perimeter. It is calculated by multiplying the circle’s diameter (the distance across the circle through its center) by the mathematical constant pi (π), which is approximately equal to 3.14159.

The formula for the circumference (C) of a circle is:

**C = πd**

where d is the diameter of the circle.

Alternatively, you can also use the formula:

**C = 2πr**

where r is the radius of the circle (the distance from the center of the circle to its edge).

To calculate the circumference of a circle, simply plug in the value of the diameter or radius into the formula and solve for C. For example, if the diameter of a circle is 10 centimeters, the circumference of the circle would be:

**C = πd C = 3.14159 x 10 C = 31.4159 cm**

Therefore, the circumference of the circle with a diameter of 10 centimeters is 31.4159 centimeters (rounded to four decimal places).

## Diameter

The diameter of a circle is the distance across the circle through its center, and it is equal to twice the radius of the circle. The diameter is a crucial measurement for circles, as it is used to calculate other important properties such as the circumference, area, and volume of a sphere (a three-dimensional object that can be formed by rotating a circle around one of its diameters).

**To calculate the diameter (d) of a circle, you can use the formula:**

d = 2r

where r is the radius of the circle (the distance from the center of the circle to its edge).

**Alternatively, you can also use the formula:**

d = C / π

where C is the circumference of the circle and π (pi) is a mathematical constant approximately equal to 3.14159.

To calculate the diameter of a circle, simply plug in the value of the radius or circumference into the appropriate formula and solve for d. For example, if the radius of a circle is 5 centimeters, the diameter of the circle would be:

**d = 2r d = 2 x 5 d = 10 cm**

Therefore, the diameter of the circle with a radius of 5 centimeters is 10 centimeters.