Question

Work out the area of this circle. Take pi to be 3.142 and give your answer to 1 decimal place

Answer 1

Explanation:

I think you have forgotten to attach the question.

Anyways....

In order to find the area of a circle use the formula:

π
`r^(2)` Where r is the radius

For example the radius is 3cm. The area of the circle will be:

π ×
`3^(2)`

Since you have taken pi as 3.142...

3.142 ×
`3^(2)`

3.142 × 9

= 28.278

In order to find the answer to 1 decimal place, check the number next to the number right after the decimal. Is it a number greater than or equal to 5? then add +1 to the number.

= 28.3
`cm^(2)`