How Do You Find the Circumference of a Cylinder?

To find the circumference of a cylinder, you need to calculate the circumference of its circular base. The formula for the circumference (C) of a circle is:

C = 2πr

Where:

• C is the circumference.
• π (pi) is approximately 3.14159.
• r is the radius of the circular base.

Here’s how you can calculate it:

1. Measure the radius (r) of the cylinder’s base. If you have the diameter (d) instead, you can find the radius by dividing the diameter by 2 (r = d/2).
2. Multiply the radius by 2π to get the circumference.

For example, if the radius of the cylinder’s base is 5 cm, the circumference would be:

C = 2 × π × 5 ≈ 31.42 cm

This method works for any cylinder, as long as you know the radius of its base.