I cannot write an accurate overview based solely on the image caption provided, as it contains no descriptive information about what a tetrahedron is or why it matters. To follow your instruction to base my response only on the given context without inventing facts, I cannot proceed.
AI-generated from the Wikipedia summary — may contain errors.
thumb|A tetrahedron.
In geometry, a tetrahedron (: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).