To find the radius of a circle with only the circumference:
1. Recall the formula for the circumference of a circle: C = 2πr, where C represents the circumference and r represents the radius.
2. Divide the circumference (C) by 2π to isolate the radius (r). In other words, divide the given circumference by approximately 6.28 (the numerical value of 2π).
r = C / (2π)
= C / 6.28
3. Substitute the given value of the circumference (C) into the formula and perform the calculation to find the radius (r).
Example: Suppose the circumference of a circle is given as 20 units. Using the formula:
r = 20 / 6.28
≈ 3.18
Therefore, the radius of the circle is approximately 3.18 units using this method.
how to easily find the radius with only the circumference of a circle, simply
1 answer
1 answer