Geometrical Conics Including Anharmonic Ratio and Projection: With Numerous ExamplesMacmillan, 1863 - 222 páginas |
Términos y frases comunes
ABCD abscissa asymptotes auxiliary circle axis in G bisects the angle CA² CB² CD² centre chord of contact chord of curvature chords parallel circle described cone conic conjugate diameters conjugate hyperbola constant ratio corresponding CP² Draw PM drawn parallel ellipse equally inclined fixed point fixed straight line focal chord foci focus harmonic Hence inscribed latus rectum Let the tangent locus major axis meet the axis meet the curve meet the directrix meet the minor middle point minor axis opposite sides ordinate parabola parallelogram pass pencil perpendicular plane PM perpendicular point of intersection point Q points of contact polar produced projection Prop prove quadrilateral rectangular hyperbola respectively right angles semi-latus rectum semi-minor axis similar triangles Similarly straight line drawn subtends tangent and normal touches vertex vertices