To calculate the circumference of a circle, you can use the formula:
Circumference (C) = π Diameter (D)
Given that the diameter (D) of the circle is 10 mm, you can plug this value into the formula:
C = π 10 mm
The value of π (Pi) is approximately 3.141592653589793, and multiplying it by the diameter gives you:
C ≈ 3.141592653589793 * 10 mm
C ≈ 31.41592653589793 mm
When you round this to one decimal place, you will get 31.4 mm. Therefore, the circumference of a circle with a diameter of 10 mm is approximately 31.4 mm. This matches the second choice from the provided list of possible answers.
