AFOQT Practice Test

Question: 1 / 400

What is the formula for the circumference of a circle?

πr²

2πr

The formula for the circumference of a circle is given by 2πr, where r represents the radius of the circle. This formula arises from the definition of circumference as the distance around a circle. The circumference can also be expressed in terms of the diameter (d) of the circle, as the diameter is twice the radius (d = 2r). Therefore, substituting this relationship into the formula gives an alternative expression of circumference as πd.

In summary, the formula 2πr is derived directly from the geometric properties of a circle, reflecting how the radius plays a crucial role in determining the total distance around the circle. The options involving πr² refer to the area of the circle, and 4πr does not correspond to any standard measurement associated with circles.

Get further explanation with Examzify DeepDiveBeta

πd

4πr

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy