gabbyalicorn
  • gabbyalicorn
What is the exact area of a circle whose diameter is 18 cm?
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.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
jim_thompson5910
  • jim_thompson5910
formula A = pi*r^2 pi = 3.14 approximately r = radius = half of diameter
gabbyalicorn
  • gabbyalicorn
|dw:1433387436296:dw|
jim_thompson5910
  • jim_thompson5910
ok so each answer is in terms of pi, so ignore the pi's for now

Looking for something else?

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

More answers

gabbyalicorn
  • gabbyalicorn
whats the radius?
jabez177
  • jabez177
18 divided by 2
jim_thompson5910
  • jim_thompson5910
diameter = 18 radius = half of diameter
gabbyalicorn
  • gabbyalicorn
so 9
jim_thompson5910
  • jim_thompson5910
yep
jim_thompson5910
  • jim_thompson5910
then you plug that into A = pi*r^2
gabbyalicorn
  • gabbyalicorn
3.14 x 18
jabez177
  • jabez177
\[3.14 \times 8 \times 8 \]
gabbyalicorn
  • gabbyalicorn
200.96
gabbyalicorn
  • gabbyalicorn
divide it by 2?
jabez177
  • jabez177
Wait... Let me try this again...
jim_thompson5910
  • jim_thompson5910
again, ignore the pi's
jim_thompson5910
  • jim_thompson5910
every answer choice has a pi in it
gabbyalicorn
  • gabbyalicorn
8x8 = 64
jim_thompson5910
  • jim_thompson5910
but you found the radius to be 9, not 8
gabbyalicorn
  • gabbyalicorn
9 x 8 = 72
jim_thompson5910
  • jim_thompson5910
r^2 means r times r
jim_thompson5910
  • jim_thompson5910
r = 9
gabbyalicorn
  • gabbyalicorn
9 x8 x8 ?
gabbyalicorn
  • gabbyalicorn
576
jim_thompson5910
  • jim_thompson5910
idk how you're getting 9 x 8
jim_thompson5910
  • jim_thompson5910
r^2 = r x r = 9 x 9 = ?? I replaced the 'r's with 9 since the radius is 9
gabbyalicorn
  • gabbyalicorn
81?
jim_thompson5910
  • jim_thompson5910
yep so 81pi is your answer
gabbyalicorn
  • gabbyalicorn
Thank you!!!!

Looking for something else?

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