Question

What is the exact area of a circle with a radius of 12 feet?

A.
24π square feet

B.
36π square feet

C.
121π square feet

D.
144π square feet

Answer 1

The area of a circle is found by the formula

\[\large A = \pi r^2\]

So you can plug in your 'r' (radius) and you will have your exact Area

Answer 2

\[A = \pi r ^{2}\]

Answer 3

Well it seems i was a little slow on the trigger

Answer 4

im lost i dont know but i got 75.36

Answer 5

the answer is 144

Answer 6

Read the answers you dont have to multiply by Pi to know which is right

Answer 7

And no its not 144 read the answers you can select

Answer 8

That is because you evaluated...thats exactly why they put EXACT area...we know \(\large \pi \) to be an irrational number....so it can never be EXACT...just estimated...

So when we have

\[\large A = \pi r^2\] and the R is 12..we have

\[\large A = \pi (12)^2\] and we just do the 12^2 to be 144 so we have

\[\large A = 144\pi\]

Answer 9

the formula of area of a circle is pir^2 - so than will be area =144pi

Answer 10

Oh i apologize i misthought i read it as r2 not r^2

Answer 11

my bad

Answer 12

What is the exact area of a circle with a diameter of ft?

A.1936 pi
square feet

B.484 pi
square feet

C.88 pi
square feet

D.44 pi
square feet

Answer 13

i do believe it is B

Answer 14

What is the approximate area of a circle with a radius of 28 centimeters? Use π ≈ 3.14.

A.
2461.8 square centimeters

B.
87.9 square centimeters

C.
175.8 square centimeters

D.
4923.5 square centimeters