Explore the hidden symmetries within Platonic solids, focusing on the tetrahedron's surprising three-fold symmetry embedded in its four-fold structure. Delve into the geometric properties of opposite edge pairs, uncover the relationship between "three-ness" and "four-ness," and examine the tetrahedron's symmetries. Gain insights into group theory concepts, particularly the symmetric group S3, as you investigate these canonical structures. Learn how these geometric insights contribute to a deeper understanding of the tetrahedron's symmetries and their connections to abstract algebra.