Question

The illustration is a good model for which formula?



A.
A ≈ 3r^2

B.
C ≈ 3 (Pi) d

C.
A = (pi) r2

D.
C = (pi) d


http://static.k12.com/calms_media/media/1472500_1473000/1472773/1/e70726e284e44791c54bf2898c46d59e743c7ec0/TXMTH07-140304-110902.jpg

Answer 1

Your missing a pi aren't you

Answer 2

How do you measure the area and circumference of a circle

Answer 3

Split the diamater in half, and multiply the radius times pi?

Answer 4

C = 2 pi r
A = pi r^2

Answer 5

What do you think it can be?

Answer 6

Hint: 2r = d

Answer 7

Sorry this is really hard.

Answer 8

@iambatman

Answer 9

I think it may be c.

Answer 10

Not quite

Answer 11

We have C and d, and we know 2r = d

Answer 12

That leaves D.

Answer 13

Yeah, that sounds good