What is the formula to find the circumference of a circle?

The formula for finding the circumference of a circle is expressed as C = πD, where D is the diameter of the circle and π (pi) is approximately 3.14. This choice accurately captures the relationship between the circumference and diameter.

In this formula, the circumference is directly proportional to the diameter. This means that if you know the diameter of the circle, you can easily calculate the circumference by multiplying the diameter by π. This principle is fundamental in geometry and is widely used in various applications involving circular shapes.

Understanding this formula helps in practical situations such as calculating the length of a fence needed to enclose a circular area or determining the size of circular components in engineering projects.