File:Einstein-triangle-in-natural-units.svg

Summary
This is the "Einstien triange" in natural units, which is a modification of https://commons.wikimedia.org/wiki/File:Einstein-triangle-kinetic-energy.svg which user MikeRun created and licensed under "Creative Commons Attribution-ShareAlike 4.0 International" which permits my adaptation, which simply removes the factors of c and c^2 which are simply 1 in natural units.