Through which points should a line of rotation be

placed to create a cylinder with a radius of 3 units?

E and J

OF and 1

o J and G

OG and E

F and I

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo.  

Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units?

E and J

F and I

J and G

G and E

My

From the photo, we can see that:

the point F is in the middle of the length EG => EF = FG = 3 units

the point I is in the middle of the length JH and because this is a rectangle so EG = JH

=> JI = JH = 3 units

So the points should a line of rotation be placed to create a cylinder with a radius of 3 units is: F and I  where F and I are the center points of the two bases in the cylinder

step-by-step explanation: