Question

http://oi41.tinypic.com/wkb5j.jpg
Help me I'm soo confused give me a good step by step process in which I can solve this

Answer 1

What's the question?

Answer 2

Find the area of the shaded region?

Answer 3

Okay. Well the area of the outer rim will be the area of the whole circle minus the area of the inner circle and the shaded region takes up half of the outer rim.

Any idea what to do first?

Answer 4

you find the area of the big circle then subtract it from the area of the small circle

Answer 5

Yup

Answer 6

then divide by two

Answer 7

BIG Question... How do you find the area because I know for the circle is pi times radius ^2 but I'm not sure about the numbers

Answer 8

Well what is the radius of the bigger circle?

Answer 9

2

Answer 10

8 + 2

Answer 11

10

Answer 12

4 + 2 *** sorry

Answer 13

8

Answer 14

The diameter of the inner circle is 8 cm which would make its radius 4 cm. This plus the size of the outer rim gives us a radius of 6 cm for the large circle

Answer 15

\[\pi*6^2-\pi*8^2\]
is this how you set it up

Answer 16

Close, it will by pi*6^2 - pi*4^2 because the radius of the inner circle is 4

Answer 17

then after that you divide by 2

Answer 18

Okay Thank You Very Much

Answer 19

Yup :)