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

12.57

Explanation:

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Answer 2

`4\pi` or 12.57 units

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=(22)/(7)`

`C=4((22)/(7))`

`C=(88)/(7)`

`C=12.57143`

`C\approx 12.57`

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