What is the circumfrence of a circle with a diameter = 4? which of the following is the best estimation for the circumfrence

Answer 1

To find the circumference of a circle, you can use the formula:

$$C=\pi d$$

where $C$ is the circumference and $d$ is the diameter of the circle.

Given that the diameter $d=4$:

$$C=\pi \times 4\approx 3.14\times 4\approx 12.56$$

The best estimation for the circumference, when rounded, would be approximately 13. If you're looking for an integer approximation, you would say the circumference is about 13.