gabbyalicorn
  • gabbyalicorn
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 cm²
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
gabbyalicorn
  • gabbyalicorn
https://www.dropbox.com/s/nu37d4qt54hihf3/Screenshot%202015-06-09%2014.32.43.png?dl=0
anonymous
  • anonymous
\[Area~of~larger~circle-Area~of~smaller~circle\]
anonymous
  • anonymous
find the area of both circles, then subtract the small circle form the big one

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

gabbyalicorn
  • gabbyalicorn
oh i kinda maybe sorta get this 1 so 20.4 x 3.14 10.8 x 3.14 then u sutract the 2
anonymous
  • anonymous
Do you remember the area of a circle formula? We've gone over it twice now
gabbyalicorn
  • gabbyalicorn
64.056 - 33.912 and yes A= π x r ^2
anonymous
  • anonymous
And you know that \[\Large Radius=\large \frac{1}{2}Diameter\] right?
gabbyalicorn
  • gabbyalicorn
anonymous
  • anonymous
\[\sqrt{?}\]
gabbyalicorn
  • gabbyalicorn
right!
gabbyalicorn
  • gabbyalicorn
√ = radius= 1/2 diameter
anonymous
  • anonymous
\[\sqrt{}=\color{aqua}r\color{red}a\color{blue}d\color{green}i\color{yellow}u\color{brown}s?\]
gabbyalicorn
  • gabbyalicorn
long story short i was saying right but witch a check mark ^u^
anonymous
  • anonymous
Oh. I was wondering what sqrt's had to do with it.
gabbyalicorn
  • gabbyalicorn
sorry, for the confusion
anonymous
  • anonymous
Anyways, the questions give us the diameters. We have to halve those to get the radius so that we can plug into the area of a circle equation.
anonymous
  • anonymous
\[(\pi*\frac{20.4}{2}^{2})-(\pi*\frac{10.8}{2}^{2})\] is our overall equation for this problem.
anonymous
  • anonymous
Divide before squaring though
gabbyalicorn
  • gabbyalicorn
653.3712 - 183.1248 = 470.2469
gabbyalicorn
  • gabbyalicorn
?
anonymous
  • anonymous
Divide BEFORE squaring. 20.4/2 = 10.2. 10.2^2=?
gabbyalicorn
  • gabbyalicorn
aww man
gabbyalicorn
  • gabbyalicorn
104.04
anonymous
  • anonymous
104.04*pi=?
gabbyalicorn
  • gabbyalicorn
326.6856
anonymous
  • anonymous
Now repeat the process for 10.8
gabbyalicorn
  • gabbyalicorn
366.2496
anonymous
  • anonymous
10.8/2=?
gabbyalicorn
  • gabbyalicorn
oh 5.4
anonymous
  • anonymous
5.4^2=?
gabbyalicorn
  • gabbyalicorn
29.16
anonymous
  • anonymous
29.16*pi=?
gabbyalicorn
  • gabbyalicorn
91.5624
anonymous
  • anonymous
now subtract
gabbyalicorn
  • gabbyalicorn
so 91.5624 - 29.16 = 62.4024
gabbyalicorn
  • gabbyalicorn
waot no!!!
anonymous
  • anonymous
Come on man. Look at my very first reply in the thread
gabbyalicorn
  • gabbyalicorn
I was wrong sorry
gabbyalicorn
  • gabbyalicorn
91.5624 -366.2496
anonymous
  • anonymous
326-91 bruh
gabbyalicorn
  • gabbyalicorn
oh :/ sorry. 235 C
anonymous
  • anonymous
yeah that'd be it
gabbyalicorn
  • gabbyalicorn
Thank you!
anonymous
  • anonymous
No problem :)

Looking for something else?

Not the answer you are looking for? Search for more explanations.