This interactive glossary includes 59 concise video definitions that bring 3D geometry to life. Each term is explained through short, clear clips with animated 3D models, helping students visualize complex spatial ideas. Concepts covered include: 3D solids: cubes, prisms, pyramids, cones, spheres Platonic solids: tetrahedron, octahedron, dodecahedron, icosahedron, cube Structural vocabulary: vertex, edge, face, slant height Geometric operations: nets, cross-sections (horizontal and vertical