Question

To find the area of the circle to the nearest tenth. Use 3.14 for pi

Answer 1

A = 15.2 mm²

Explanation:

The formula of an area of a circle:

`A_O=\pi r^2`

r - radius

We have the diameter d = 4.4 mm.

d = 2r ⇒ r = d : 2

`r=4.4:2=2.2\ mm`

Substitute:

`A_O=\pi(2.2^2)=4.84\pi\ mm^2`

`\pi\approx3.14\to A_O\approx(4.84)(3.14)=15.1976\ cm^2\approx15.2\ mm^2`

Answer 2

Answer: Area of circle = 15.2 mm².

Explanation:

Since we have given that

Diameter of circle = 4.4 mm

Radius of circle =
`(4.4)/(2)=2.2\ mm`

As we know that

Area of circle is given by

`\pi r^2\\\\=3.14* 2.2* 2.2\\\\=15.19\ mm^2\approx 15.2\ mm^2`

Hence, Area of circle = 15.2 mm².