Question

The radius of a circle is 1.8cm. Find it’s circumference to the nearest tenth.

Answer 1

`C = 11.3 \text{ cm}`

Explanation:

We can find the circumference of the circle by using the formula:

`C = 2\pi r`

↓ plugging in the given radius

`C = 2\pi (1.8 \text{ cm})`

`C = 3.6\pi \text{ cm}`

↓ rounding to the nearest tenth

`\boxed{C = 11.3 \text{ cm}}`