OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

Your missing a pi aren't you

2 years ago
OpenStudy (anonymous):

How do you measure the area and circumference of a circle

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

C = 2 pi r A = pi r^2

2 years ago
OpenStudy (anonymous):

What do you think it can be?

2 years ago
OpenStudy (anonymous):

Hint: 2r = d

2 years ago
OpenStudy (anonymous):

Sorry this is really hard.

2 years ago
OpenStudy (anonymous):

@iambatman

2 years ago
OpenStudy (anonymous):

I think it may be c.

2 years ago
OpenStudy (anonymous):

Not quite

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

That leaves D.

2 years ago
OpenStudy (anonymous):

Yeah, that sounds good

2 years ago