Question

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

1) C = 2πr
2) C = πr²
3) = πd
4) C = 2r

Answer 1

The formula to calculate the circumference of a circle is C = 2πr, where C represents the circumference, π represents pi (approximately 3.14159), and r represents the radius of the circle.

Step-by-step explanation:

The formula to calculate the circumference of a circle is:

C = 2πr

In this formula, C represents the circumference, π represents the mathematical constant pi (approximately 3.14159), and r represents the radius of the circle.

For example, if the radius of a circle is 5 units, the circumference can be calculated as:

C = 2π(5) = 10π units