1 Answer

Yan Pak · Answer 1 · 2022-01-27T17:14:48+0000

Explanation:

Before we answer, the area of a Circle given it radius is

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

The area of a circle given it diameter is

$a = \pi( (d)/(2) ) {}^(2)$

So let answers question 1-4.

1. The area is

$1024\pi$

2. The area is

$576\pi$

3.

$1.225\pi$

4.

$309.76\pi$

For the 5th problem, circumference is

$\pi * d$

where d is the diameter and

$2\pi r$

where r is the radius.

A circumference of 100 m means the radius is 50 because

$2\pi * r = 100\pi$

So this means the area is

$2500 {\pi}$

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