Elements of Geometry

ABCD altitude approach axis base bisect bisector called centre chord circle circumscribed coincide common Comparing Conclusion cone construction contained Corollary corresponding curve definition describe diagonals diameter difference dihedral angle direction distance divided draw drawn edges ellipse equal angles equally distant expressed exterior angle faces fall figure four geometry given greater half Hence hyperbola Hypothesis identically equal indefinitely inscribed intersection Join lateral length less limit magnitude mean measured meet opposite sides pair parallel parallelogram pass perpendicular plane polygon position prism PROBLEM produced Proof proportion pyramid quadrilateral radius ratio rectangle regular respectively right angles segments shown sides similar solid sphere spherical square straight angle straight line suppose surface tangent THEOREM third touch triangle turned vertex vertices volume whence whole