Elements of Geometry

ABCD altitude angles are equal apply approaches base bisects called centre chord circle circumference circumscribed coincide common cone construct contains corresponding cylinder describe diagonals diameter diedral angles difference distance divided draw drawn edges equal equivalent Exercise extremities fall figure Find formed four frustum given given point GIVEN—the greater half Hence homologous hypotenuse included indefinitely inscribed intersection isosceles joining lateral area length less limit locus mean measured meet method middle point parallelogram parallelopiped passed perimeter perpendicular plane polygon position prism proportional PROPOSITION PROVE pyramid quantity radii radius ratio rectangle regular polygon respectively right angles right triangle segment sides similar sphere square straight line surface symmetrical tangent THEOREM third triangle triangle ABC triangular unequal unit vertex vertices volume zone