Question

That's the question ?? ​

Answer 1

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`

`r = 50`

So this means the area is

`2500 {\pi}`