Question

NEED HELP FAST WILL GIVE MEDAL AND FAN

The diameter of the larger circle is 20.4 cm.
The diameter of the smaller circle is 10.8 cm.

What is the approximate area of the shaded region?


A.
326.7 cm²

B.
289.4 cm²

C.
235.1 cm²

D.
72.3 cm²s


Picture to the problems link

http://static.k12.com/calms_media/media/1419000_1419500/1419371/1/c4e26a94203d8ae90d1065d72cde797bf3ba1a4c/MS_PA_130922_171142.jpg

Answer 1

search it wiki answers they have really great answers there just go to wiki answers

Answer 2

don't go to wiki you wont learn anything

Answer 3

Find the area of the big circle
Find the area of the little circle
Subtract the second answer from the first answer.
That is the area of the shaded region.

Answer 4

im not shure how :[

Answer 5

area of circle = pi r^2
r = 0.5 (diameter)

Answer 6

Area of a circle is pi times radius squared

Answer 7

\[A=\pi r^2\]

Answer 8

i subtract both of them from each other

Answer 9

area of large circle = pi r^2
r = (0.5)(20.4) = 10.2
so area of large circle = pi (10.2 ^2)

r = (0.5)(10.8) = 5.4
so area of small circle = pi (5.4 ^2)

then area of shaded area = (10.2 ^2)pi - (5.4 ^2)pi =

Answer 10

So c?