- First copy the octagon a distance of 50 units relative to the surface of the wheel, which is where the base of the prism will be located. In the Copy window, choose Translation and Lines. Since we want to translate 50 units, enter two points that define the vector of this translation, for example (0, 0, 0) and (0, 0, 50). (Make sure that the Multiple Copies value is 1, since the last time the window was used its value was 9).
- Choose Select and select the lines of the octagon. Press ESC to conclude the selection.
...