Question

Suppose the radius of a circle is \color{purple}{2}2start color purple, 2, end color purple units. What is its circumference?

Answer 1

Answer:

$4\pi$ or 12.57 units

Step-by-step explanation:

It is given that the radius of a circle is 2 units.

We need to find the circumference of the circle.

The formula for circumference of a circle is

$C=2\pi r$

where, r is the radius of the circle.

Substitute r=2 in the above formula.

$C=2\pi (2)$

$C=4\pi$

Here, $\pi=\dfrac{22}{7}$

$C=4(\dfrac{22}{7})$

$C=\dfrac{88}{7}$

$C=12.57143$

$C\approx 12.57$

Therefore, the circumference of the circle is $4\pi$ or 12.57 units.