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Mathematics 7 Online
OpenStudy (fuzzyball):

FAN AND MEDAL Which circles have an area of 36pi ft2? Choose all answers that are correct. A. a circle with a radius of 6 ft B. a circle with a diameter of 6 ft C. a circle with a radius of 12 ft D. a circle with a diameter of 12 ft

OpenStudy (anonymous):

Area of a Circle = Pi * radius * radius. Diameter/2 = Raidus.

OpenStudy (welshfella):

pi r^2 pi 36 - so r^2 = 36 r = what?

OpenStudy (welshfella):

you need to find the square root of 36

OpenStudy (fuzzyball):

6

OpenStudy (welshfella):

correct r ( the radius) = 6 and diameter = 2*6 now you should know the correct choices

OpenStudy (fuzzyball):

A and C?

OpenStudy (welshfella):

there are 2 which are correct

OpenStudy (fuzzyball):

is A one of them?

OpenStudy (welshfella):

A is correct but not D

OpenStudy (fuzzyball):

B?

OpenStudy (welshfella):

Sorry! Not C.

OpenStudy (fuzzyball):

is it B?

OpenStudy (welshfella):

what did you get for the diameter?

OpenStudy (fuzzyball):

12

OpenStudy (welshfella):

thats right so how can it be B?

OpenStudy (fuzzyball):

soo D

OpenStudy (welshfella):

yes its D

OpenStudy (fuzzyball):

THANK SOOOOOO MUCH! YOUR A LIFESAVER

OpenStudy (welshfella):

yw

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