find the area of a circle whose circumference is 8 pie m?
a. 4 pie m squared
b. 8 pie m squared
c. 16 pie m squared
d. 64 pie m squared

Question

find the area of a circle whose circumference is 8 pie m?
a. 4 pie m squared
b. 8 pie m squared
c. 16 pie m squared 
d. 64 pie m squared

anonymous · Answer

@rational

anonymous · Answer

@AJ01

rational · Answer

start by finding the radius of circle using given info

rational · Answer

remember circumference of circle formula ?

anonymous · Answer

not rly

rational · Answer

must be there in ur notes, check once

anonymous · Answer

dont have any

rational · Answer

https://lh3.ggpht.com/Xozc0VCpMDuE16GQZ2S3WNxTJxV16Hv0oviNSh_ZpcErbNB-fVfYtYvOBQAzufNSNqM=w300-rw

anonymous · Answer

so its 2 times 3.14 times 8 right?

rational · Answer

leave pie as pie, dont replace it with 3.14

rational · Answer

$$2\pi r = 8\pi$$

solve $r$ first

anonymous · Answer

24?

rational · Answer

$$2\pi r = 8\pi$$

cancel $2\pi$ both sides 
$$r = 4$$

rational · Answer

plug that in area of circle formula

anonymous · Answer

32

anonymous · Answer

use the same equations  area= pi*r^2, circ= 2*pi* r
you have the circ so find r using 2nd equation then use the value of  r in the second equation....

anonymous · Answer

circ= 2*pi*r= 8 pi => r=(8 pi)/(2 pi)=4
area= pi r^2= pi (4)^2= 16 pi

anonymous · Answer

so is that the final answer???

anonymous · Answer

C

anonymous · Answer

yes