Please Show me how to find the circumference and the area for each circle in terms of PI
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Please Show me how to find the circumference and the area for each circle in terms of PI

[From: ] [author: ] [Date: 11-09-09] [Hit: ]
r = 3 in.19. d = 15 m-18.to find the circumference, multiply 3 in. by 2 to get the diameter.......
I am not looking for an answer just easy steps on how to do this. It would be very helpful Thank you!

18. r = 3 in.
19. d = 15 m

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18. to find the circumference, multiply 3 in. by 2 to get the diameter. then multiply the diameter by pi. (3.14) (the formula is Circumference= pi times diameter

the formula to find the area is A = pi times radius squared.
so you square 3(multiply 3 times 3) and multiply that answer by pi (3.14).

for #19, do the same thing, but for the circumference, you don't multiply by 2, and for the area, you divide by 2 instead.

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Circumference = 2*pi*r
Area = pi *( r*r)
pi=3.14159
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