2 Answers

Gabriele Mariotti · Answer 1 · 2022-06-15T05:31:33+0000

Answer:

A ≈ 3.9

Explanation:

How to solve

A=πr2

C=2πr

A=C2

4π=72

4·π ≈ 3.8993

Therefore, the circle in square meters in the nearest tenths is A ≈ 3.9

Nasia Ntalla · Answer 2 · 2022-06-17T10:05:35+0000

Answer:

$12.25\pi\,\,m^2$

Explanation:

Given: Circumference of a circle =
$7\pi\,\,m$

To find: Area of a circle in terms of
$\pi$

Solution:

Let r denotes radius of a circle.

Circumference of a circle =
$2\pi r$

$7\pi=2\pi r\\7=2r$

Divide both side by
$\pi$

$3.5\,m=r$

Area of a circle =
$\pi r^2$

Put
$r=3.5\,\,m$

$=\pi (3.5)^2\\=12.25\pi\,\,m^2$

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