On Metric Relations in a Rectangular Tetrahedron and Related Issues: MATHEMATICS. PHYSICS

The presented article is dedicated to the systematization of facts about the geometry of the tetrahedron, particularly the orthocentric and rectangular types, and to popularizing the properties of the rectangular tetrahedron. The article also highlights the author's approach to the possible introduction of the properties and metric relations of the rectangular tetrahedron into the school geometry curriculum through the careful selection of didactic material during the study of relevant topics in stereometry.