I have a cube. I want to trace all the edges of the cube only once, lifting my pencil as few times as possible.
Look at the top of a cube, and label the top left vertex as a and travel Clockwise labeling b, c, and d, with point e under a, f under b, g under c and h under d.
The best I've been able to do is trace a-b,b-c,c-d,d-a,a-e,e-f,f-g,g-h,h-e. Then I have to clean up with b-f, then c-g, then d-h. This gives me 4 pencil traces.
Is there a way to do it with fewer traces?