This is the tetrahedron I made using Ply Wood, I first drew the triangles and then cut them using the motor saw, following the lines. Then I smoothened the edges using the belt sander. and glued them with a hot glue gun. If I had another chance to do it again, I would definitely think and plan more about the angles to make it neater. I would also use a wood glue instead of the hot glue gun.
