Elementary Solid Geometry and Mensuration

adjacent altitude axis base called centre circle circumscribed coincide common cone conical containing convex COROLLARY cube cuboid curve cylinder DEFINITION determined diagonal diameter dihedral angle distance divided edges element equal equal respectively equivalent EXERCISES face angles figure find the volume fixed frustum geometry given greater half height hence homologous inscribed intersection lateral edges length less lies limit line of intersection lune measure meet namely normal opposite sides pair parallel lines parallelepiped parallelogram passes perpendicular plane angle plane section plane ẞ pole polygon polyhedron portion prism projection proposition proved pyramid quadrants radius ratio regular respectively right circular cone sides similar solid space sphere spherical triangle square straight line surface taken tangent tetrahedron THEOREM third three sides triangular trihedral vertex vertices volume