Question

What is the exact circumference of the circle?



A.
48 inches

B.
32 inches

C.
16 inches

D.
8 inches


https://static.k12.com/calms_media/media/1419000_1419500/1419356/1/9ee5463168e0f0fa802a7e4be7f67e9f074d19ee/MS_PA_130922_171128.jpg

I tried to do this by doing 3.14 x the diameter which I think is 16 or possibly 32 because radius times 2 is the diameter. Please help!

Answer 1

B

Answer 2

16 divided by 2 is what?

Answer 3

D

Answer 4

@ProMiner10000, I will work it out with you. :)

Answer 5

16 /2 = 8.

Answer 6

Right. So the formula for circumference is: \[2\times \pi \times radius\]

Answer 7

So 2 x 3.14 x 8?

Answer 8

Yes, Sir!

Answer 9

@jabez177 but when I do that I get 50.24 but the only answer choices are 48, 32, 16 and 8.

Answer 10

Ohhhhh!! They want the exact.
Does your choices end in PI? \[\pi \]

Answer 11

Like \[48\pi \]

Answer 12

Yes.

Answer 13

Ahhhh! Now I understand it. :)
We don't multiply the PI or 3.14
We just do 2 x 8 and your answer will be what?

Answer 14

16.

Answer 15

But so that I can do this myself later, where did you get 8 from?

Answer 16

We need to get the radius so radius is basically half of the diameter.

Answer 17

So the diameter is 16 and then the radius is 8?

Answer 18

so 16 divided by 2 is 8

Correct. :)

Answer 19

Ok, thank you so much!

Answer 20

You are most welcome. :)