Question

Help please with this math

Answer 1

1) 172.543

2) 24.649

3) 473.2608

4) 157

5) 100.48

6) 692.37

(idk if u wanted it rounded)

the formula is=

Full circle- pi(r)^2

Half circle- pi(r)^2÷2

Answer 2

Step-by-step explanation: I will do 1, 2, 3, and 4 but its the same concept for all

1.

First, the formula for the area of a circle is πr² (r = radius)

To find radius, we have to divide the diameter by 2. Now lets plug in our numbers

πr²

3.14 · 17.5 ²

3.14 · 306.25

Area of 1. is 961.6 in²

2.

This is already the radius, so we simply plug in our numbers

πr²

3.14 · 2.5²

3.14 · 6.25

Area of 2. is 19.625 m²

3.

πr²

3.14 · 48²

3.14 · 2304

Area of 3. is 7234.56 mm²

4. Now, this one is a semicircle, so it may seem hard, but all we have to do is divide the area by 2

First, convert the diameter. So now lets plug it in

πr²

3.14 · 10²

3.14 · 100

314 / 2

Area of 4. is 157 in²

I hope this helps you :)