The circumference of a circle is the distance around it, and it’s calculated using the formula:
C = 2πr
In this formula:
- C represents the circumference of the circle.
- π (pi) is a mathematical constant approximately equal to 3.14159, but it is often expressed simply as π in equations.
- r represents the radius of the circle, which is the distance from the center of the circle to any point on its edge.
To express the circumference in terms of pi, you would simply calculate it using the radius you have:
- If you know the radius, substitute its value into the formula.
- For example, if the radius is 5 units, then:
- This means the circumference of the circle is 10π units.
C = 2π(5) = 10π
Thus, for any given circle, just multiply the radius by 2 and then by pi to get your circumference in terms of pi!