What is the formula for calculating the circumference of a circle?

The formula for calculating the circumference of a circle is based on the relationship between the circle's diameter and the constant π (pi). The correct formula, π multiplied by the diameter, gives the total distance around the circle.

This relationship arises from the definition of π, which is the ratio of a circle's circumference to its diameter. Therefore, when you multiply the diameter by π, you obtain the length of the circumference. Understanding this formula is essential in various applications, including area calculations, engineering, and construction, where precise measurements of circular objects are necessary.

The other formulas provided focus on different properties of circles or mathematical concepts, making them irrelevant for calculating circumference. For instance, multiplying π by depth relates more to volume calculations rather than perimeter measurements, while area and volume also apply to different geometric contexts.