Elements of Geometry and the First Principles of Modern Geometry

ABCD altitude axis base bisect called centre chord circle circumference circumscribed common cone congruent construct contained conversely corresponding cylinder diagonals diameter difference dihedrals direction distance divided draw edges element equal equally distant equations EXERCISE extremities face angles fall figure follows formed four given gives greater hence HYPOTH included inscribed intersection joining lateral less lines drawn locus manner measure meet number of sides opposite sides parallel parallelogram pass perpendicular plane polar pole polygon polyhedral polyhedron position prism Problem PROOF proportional PROVED pyramid radii radius regular respectively right angles SCHOLIUM segments shown sides similar solid SOLUTION sphere spherical square straight line supplements surface symmetrical tangent Theorem third triangle triangle ABC vertex vertices volume