Question

If a circle has a diameter of $\text{4 inches}$, what is the circumference ?

Answer 1

Finding the circumference of the given circle.

Given that the diameter of the circle $\text{= 4 inches}$

The radius of the circle $=\frac{Diameter}{2}$

$\therefore r=\frac{4}{2}=2\text{inches}$

Now,

Circumference of circle $=2\mathrm{\pi r}$

$$\begin{gathered} =2\times 3.14\times 2 \\ =12.56\text{inches} \end{gathered}$$

Hence, the circumference of the given circle is $12.56\text{inches}$.