Question

The area of a circle is 44 cm2.

If its radius is r cm, find r, correct to two decimal places.
Be careful not to round your answer until the very end.

pi r^{2}=

Answer 1

≈ 3,74 cm

Explanation:

Given:

A (area) = 44 cm^2

Find: r (radius) - ?

`a = \pi {r}^(2)`

`\pi {r}^(2) = 44`

`{r}^(2) = (44)/(\pi)`

`r = \sqrt{ (44)/(\pi) } ≈3.74`

Answer 2

Explanation:

Area of a circle = pi r^2

44 cm^2 = pi r^2

r = sqrt (44/pi)

r = 3.74 cm