Elements of Plane and Solid Geometry

ABC and DEF ABCD altitude Apply base bisector bisects called chord circle circumference circumscribed coincide common cone Construct contains CONVERSELY COROLLARY cutting cylinder DEFINITION described diagonals diameter difference dihedral angles divided Draw drawn edges equally distant equilateral triangle equivalent EXERCISE exterior angles extremities faces figure Find four frustum given given line given point greater half homologous included increased inscribed isosceles lateral area length less Let ABC limit line joining mean measure meet middle points parallel parallelogram parallelopiped pass perimeter perpendicular plane polygon polyhedron prism prolonged Proof proportional PROPOSITION Prove pyramid quadrilateral radii radius ratio rectangle Required respectively right angles segments Show sides similar sphere spherical square straight line surface tangent tetrahedron THEOREM third trapezoid triangle triangle ABC unequal unit vertex vertices volume Whence