Question

Find the area of the circle to the nearest tenth. Use 3.14 for π.

Answer 1

Explanation:

Use the formula for area of a circle

A =
`\pi r^(2)`

The diameter is 8ft, if there was only a line from the middle to the edge of the circle, then it would be radius

The radius is half the diameter so divide 8 by two and you get the radius

Plug in the radius into the formula

A =
`(4ft)^(2) \pi`

the parenthesis indicate you aren't only squaring the ft, but also the 4

4ft * 4ft = 16
`ft^(2)`

(remember you are also multiplying the unit, in this case feet)

A =
`16ft^(2) \pi`

there aren't parenthesis here, meaning you aren't squaring the 16

A = 50.24
`ft^(2)`