I would like to find a software that lets me create graphics of a surface with a triangulation on it. It doesn't need to be very fancy; I just need to explain to a bunch of high schoolers what a triangulation of a surface is, but without getting technical. Everything will be pretty graphical and intuitive.
EDIT: I would prefer something that’s open source since I have a Linux machine.
Thanks.
trimesh2 includes a mesh viewer, with binaries for popular platforms.
MeshLab is a complete modeling system.