An Elementary Geometry: Plane, Solid and Spherical

acute adjacent altitude base bisecting Book called centre chord circle circumference circumscribed coincide common constant contained Conversely Corollary DEFINITIONS described diagonals diameter diedral angles difference direction distance divided draw drawn edges equal equally distant equilateral equivalent extremities feet figure formed four frustum given angle given line given point greater half hence homologous lines hypothenuse included inscribed intersection isosceles triangle less locus mean measure meet number of sides opposite opposite sides parallel parallelogram parallelopiped pass perimeter perpendicular plane plane M N polygon prism PROBLEM produced proportion proposition proved pyramid quantity radius ratio rectangle regular polygon respectively right angles right triangle segments sides similar sphere spherical triangle square straight line tangent THEOREM third triangle A B C triangular triedral vertex vertices volume