Aula 1

 autocad 3D
1st of all, set the workspace as 3ple (or more) window with difrent views of the object ( vports )
using region comand makes a sum of lines as a 2d object.
create a square in order to reshape them into a cube, so, we start with an exploded type of obejedct and project each face on the xy plane.
-UCS- fulcral comand to rearange the shapes in order to manipulate them in the 3D space.
after merging, rigouresly, each and all faces, we can -surfsculpt- the 6 closed faces in order to create a solid.
Then, using the planes on UCS we can rotate them faces in order to shape the square.
To create a Triangle polygon we use the same concepts that we used to create the previous shape, using circles to rotate the faces.
To make our lives easier we can just find the matching point of each circles and create a -3DPOLY- of each face and the top matching point.
or we could use the -ClassicArray- to use the triangular shape and multiply it in a circle with the number of repetitions we desire.