The circumference of a circle is 12π cm. What is the circle's area?

6πcm^2
12πcm^2
36πcm^2
144πcm^2

Question

The circumference of a circle is 12π cm. What is the circle's area?

6πcm^2
12πcm^2
36πcm^2
144πcm^2

anonymous · Answer

what is the equation for circumference?

anonymous · Answer

The circumference of a circle is the actual length around the circle which is equal to 360°. Pi (p) is the number needed to compute the circumference of the circle. 
p is equal to 3.14.
Pi is greek and has been around for over 2000 years!

In circles the AREA is equal to 3.14 (p) times the radius (r) to the power of 2. 
Thus the formula looks like:
A= pr2.

In circles the circumference is 3.14 (p) times the Diameter. 
Thus the formula looks like:
2pr or pd.

terenzreignz · Answer

2πr would have sufficed :D

terenzreignz · Answer

Whoops. sorry, @Hope_nicole , please carry on ^.^

anonymous · Answer

haha oh no you are fine! i was just waiting to see what you were going to say @terenzreignz .
anyways though, if we know the circumefernce is 2PIr and it says that is it 13pi, what is  r?

anonymous · Answer

please allow the user to go through the steps @ankitojha

terenzreignz · Answer

excerpt from the Code of Conduct, @ankitojha 
"Don't just provide the answer to a problem when someone else is in the middle of helping!"

anonymous · Answer

Sorry !