obbeel@lemmy.mlM to Mathematics@lemmy.ml • 3 years agoTetrahedron - Wikipediaexternal-linkmessage-square0 fedilinkarrow-up11
arrow-up11external-linkTetrahedron - Wikipediaobbeel@lemmy.mlM to Mathematics@lemmy.ml • 3 years agomessage-square0 Commentsfedilink