Elements of Geometry

altitude angle ACB angle BAC angles equal apothegm base bisectrix centre chord circf circle circumference circumscribed common cone construct Corollary cylinder diagonals diameter dicular diedral angles distance divide draw drawn edges equal angles equally distant equivalent faces Find the locus frustum geometrical locus given point greater Hence homologous hypothenuse inscribed intersect join lateral surface let fall line AC lune measure middle point multiplied number of sides oblique lines opposite parallel parallelogram pendicular perimeter perpen perpendicular plane angles plane MN polar line polyedron polygon ABCDE prism Prop proportional PROPOSITION pyramid quadrilateral radii radius ratio rectangle regular polygon right angles right line right-angled triangle SABC Scholium secant segment side BC similar solid angle sphere spherical polygon spherical triangle square symmetrical tangent tetraedrons THEOREM three sides triangle ABC triedral vertex vertices