In geometry, the circumference (from Latin circumferens, meaning carrying around) is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment.

## Which is the circumference of a circle?

To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).

## What is part of the circumference of a circle called?

An arc is part of the circumference of a circle. If the arc is over half of the circumference then it is called a major arc. If it is less than half of the circumference it is called a minor arc.

## What are the names of a circle?

It has two points on the outside edge of the circle. Write the name of each circle, radius, and diameter. A circle is named by the point in the center. A radius is a line segment from the center of the circle to the edge.

## How do you measure a circle?

The formula is: circumference = pi times the diameter. For most projects, 3.14 can be used as the value for pi. Rewriting the equation, the circumference = 3.14 X diameter. For example, a circle with a diameter of 6 inches has an approximate circumference of 18.84 inches.