To calculate the circumference of a circle, you can use the formulas C = 2πr, using the radius, or C = πd, using the diameter, where π is approximately 3.14159.
The formulas that can be used to find the circumference of a circle include the following:
C = 2πr, where r represents the radius of the circle.
C = πd, where d represents the diameter of the circle.
To determine the circumference using the radius, you would multiply the radius by 2 and then by π (approximately 3.14159). When using the diameter, you would simply multiply the diameter by π to get the circumference.
The probable question may be: "Which formulas can be used to find the circumference of a circle"