Regular dodecahedron, I don't know which dodecahedron you are talking about. First use a computer to simulate and get the angle, and then cut it with paper. This is what I did when I painted polyhedrons, but there are prismatic dodecahedrons, regular pentagonal dodecahedrons and maybe others. I have simulated both of them. An icosahedron consists of a regular triangle, and a regular tetrahedron consists of a regular triangle. And the aspect ratio is1:1.1494511. You can't tell the method, just like telling you the answer, you don't know the process!