## Example Question

A circular pond has a radius of 8 metres.a) Find the area of the pond.

b) Find the circumference of the pond.

Give your answers to one decimal place.

## Solution

a) The area of the pond is given by the formula A = πr^{2}. Where r is the radius of the pond.

So area of pond = π x 8

^{2}= 201.0619298 = 201 m

^{2}(1 decimal place.)

b) The circumference of the pond is given by the formula C = πD. Where D is the diameter of the pond.

Remember: The diameter is twice the size of the radius = 8 x 2 = 16 m

So the circumference of the pond = π x 16 = 50.26548246 = 50.3 m (1 decimal place.)

## Test Yourself!

Find the area of the circle below. Give your answer to 1 decimal place.m

^{2}

Find the circumference of the circle below. Give your answer to 1 decimal place.

cm