I selected the round face of a cylinder and measured it. I got several values, one of which was 'perimeter'. While I understand the concept of a perimeter, I do not understand what this value represents. How can an 8" diameter x 24" long roller have a perimeter of 72.76"? Even in the cross section, I would expect it to be 64". What is being measured to get 72.76"?

Hi Walter,

Good question - perimeter is the length of all the edges of that face summed up

So for a simple cylinder selecting the cylindrical face will yield 2*Circumference or 2*Pi*D

As soon as you add any other cutouts or features though like the keyway below, the perimeter of that face will go up since there are now additional edges on that face.