How do you find the circumference of a circle?

To find the circumference of a circle, you need to know its radius or diameter. The circumference of a circle is the distance around the circle's edge or perimeter.

The formula for finding the circumference of a circle is:

Circumference = 2 x π x radius

or

Circumference = π x diameter

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

To use the formula, simply plug in the value of the radius or diameter and solve the equation. For example, if the radius of a circle is 5 units, then its circumference is:

C = 2 x π x 5 = 31.42 units

Or, if the diameter of the same circle is 10 units, then its circumference is:

C = π x 10 = 31.42 units

The circumference of a circle is the distance around it. To find the circumference, you need to know the radius or diameter of the circle.

• If you know the radius, multiply it by 2 and then by pi. Pi is an irrational number that is approximately equal to 3.14.
• If you know the diameter, multiply it by pi.

Here are some examples:

• If the radius of a circle is 5 cm, the circumference is 2 * 3.14 * 5 = 31.4 cm.
• If the diameter of a circle is 10 cm, the circumference is 10 * 3.14 = 31.4 cm.

Here is a formula for the circumference of a circle:

$C = 2\pi r$

where $C$ is the circumference, $r$ is the radius, and $\pi$ is approximately equal to 3.14.