2. What is the circumference of a circle with a diameter of 45 centimeters?

Question

2.   What is the circumference of a circle with a diameter of 45 centimeters?

solomonzelman · Answer

C=πd

anonymous · Answer

what I don't understand?

mathlegend · Answer

$$C=2\pi r$$

solomonzelman · Answer

same thing.

mathlegend · Answer

Yes, @SolomonZelman I was not trying to rain on your parade. I understand that but I don't think @mkmkmk knew it in that form. Do you understand?

mathstudent55 · Answer

The circumference of a circle is pi times the diameter of the circle.

anonymous · Answer

these are my options 

A.  141.4 centimeters 
B.  282.7 centimeters 
C.  6,361.7 centimeters 
D.  70.7 centimeters

mathlegend · Answer

@mkmkmk ... @SolomonZelman was basically putting it into terms with the diameter since they gave you the diameter. If that makes since.

solomonzelman · Answer

No, I ddin't mean that you... I just explain. It did come out this way; sorry.