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Mathematics 9 Online
OpenStudy (anonymous):

WILL MEDAL

OpenStudy (anonymous):

Which circles have an area of 16πin2? Choose all answers that are correct. A. a circle with a radius of 2 in. B. a circle with a radius of 4 in. C. a circle with a diameter of 8 in. D. a circle with a diameter of 16 in

OpenStudy (anonymous):

I think B and C

OpenStudy (agent0smith):

Why do you think B and C? Show some work so we know if you've done it correctly.

OpenStudy (anonymous):

B. 4x4 or 4 squared is equal to 16

OpenStudy (anonymous):

Is D one because 4*4=16 and the equation is 16πin squared

OpenStudy (anonymous):

hello?

OpenStudy (anonymous):

hi

OpenStudy (anonymous):

plz help

OpenStudy (agent0smith):

You're correct on B.

OpenStudy (anonymous):

k, is b or c one?

OpenStudy (agent0smith):

What is the area for a circle?

OpenStudy (anonymous):

yes indeed i would say b,and c

OpenStudy (anonymous):

what about D?

OpenStudy (anonymous):

let me work out d

OpenStudy (anonymous):

yes indded it would be d to

OpenStudy (anonymous):

A=πr squared

OpenStudy (agent0smith):

Yes, so you know B is true. What about C?

OpenStudy (anonymous):

that could be it to

OpenStudy (anonymous):

C= 8÷2=4 and 4*4=16

OpenStudy (agent0smith):

Stop guessing @CoDe-Of-CoNdUcT

OpenStudy (agent0smith):

Right, so you know C is true. What about D?

OpenStudy (anonymous):

im not it b and c

OpenStudy (anonymous):

or c and d

OpenStudy (anonymous):

D=16 so its not one of the answers

OpenStudy (anonymous):

ok so yea b and c

OpenStudy (agent0smith):

Why is D not one? Show the work

OpenStudy (anonymous):

so B and C are the correct answers?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

thanks I'll medal agent0smith and I wil Fan Code-of-conduct

OpenStudy (anonymous):

please meddle and fan ^_^

OpenStudy (agent0smith):

D is not one because the radius would be 8, and 8^2 = 64. So yes B and C

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