1- First we have to press the command polyline and on top, it will appeare a space to write the coordinates that are: -5,0,0, and then we have to press enter. When we have finished these process we have to write the coordinates: 5,0,0.
2- Then we have to press the comand move and select the line and type the middle point, when we have finished this process we have to write the coordinates: 0,15,0. This will move the line.
3- When we have finished we have to go to C Planes and click on Set C Plane World Right. Click on move and select the comand Polar Array, when we have presed enter, we have to write the coordinates: 0,0,0.Then we have to write: 9 and finally we have to write the coordinates: 180 enter.
4- We have to click the arrow in C Plane to go back words with the plane.
5- To create the Mobius strip, we have to click on the command Set C Plane by 3 points and we have to select the original plane and press enter, and then we have to select the middle point of the line you want to move, press enter. When we have finished that, we will have to select the command Rotate 2D and select the line you want to rotate, enter, then the middle point and click on it and write the coordinates: 90. We have to do the same on each line but with different coordinates: 78.5/67.5/56.25/45/33.75/27/27.5/11.25. Finally we will have created this:
6- First we have to do a line on top of one that you already have with the command polyline. When we have finished these process, we will have to select the command surface from 3 or 4 corner points, then we will have to press the command loft and it will appear a message, when we have read it we will have to click on OK, and finally we will have created these:
7- Finally we will have to click on perspective and select ghosted.And we will have created this: