Construction of a Dodecahedron

Stéphane Gazel

10 Nov, 2022 01:10 AM

Some CAD software such as AutoCAD does not have all the geometric objects, in particular the famous Dodecahedron.
A method
simple drawdown in descriptive geometry.

1. Step 1: Pentagon

   Command polygon 5 faces, draw the bisectors,

   

   
   

   

   
   

   
   

   
   

   
   

   
   

   
   

   
   

   
   

2. Step 2: Plan folding

   Construct their symmetric projection or command MIROIR ... With respect to the red axis and create point A.

   

   Draw the penpendicular line on Z at A.

   
   

   For the positioning of the angle of the projection of the bisector fold it on the perpendicular in Z (Cyan blue on the image)

   

   
   

   
   

   
   

   
   

   
   

   
   

3. Step 3: Alignment

   Align the base pentagon with the new projected bisector (in magenta on the image). Command ALIGNER.

   

   
   

   Build the other pentagons. RESEAUPOLAIRE commands (_-arraypolar)

   

   
   

   Finish missing faces, several solutions, ALIGNER, MIROIR, COPY and ROTATE and mores...

   

   
   

   For a better vision finish with command SURFACE you can EXTRUDE in SOLID too...