Final answer:
To find the diameter of a circle when you know the circumference, divide the circumference by π.
Step-by-step explanation:
To find the diameter of a circle when you know the circumference, you can use the formula:
diameter = circumference / π
where π is approximately 3.14159...
For example, if the circumference of a circle is 20 units, the diameter would be:
diameter = 20 / π ≈ 20 / 3.14159 ≈ 6.37 units