Question

The diameter of a circle is 7 in. Find its area to the nearest tenth.

Answer 1

`38.5in^(2)`

Explanation:

Area of a circle =
`\pi r^(2)`

Radius of circle =
`7*(1)/(2)`

`= 3.5`

So,
`\pi r^(2) = \pi * 3.5^(2)`

`= \pi * 12.25`

`= 38.48451...\\`

`= 38.5` (
`1` d.p)

`\therefore` the area of the circle is
`38.5 in^(2)` rounded to the nearest tenth place.

Hope this helps :)

Answer 2

38.46≅38.5

Explanation:

Area = П

r = diameter / 2

= 7/2

r =3.5

Π= 3.14

Area = 3.14 × = 38.46

to the nearest tenth = 38.5 in