The Geometry of ConicsReprint of the original, first published in 1873. |
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Common terms and phrases
abscissa auxiliary circle auxiliary point bisects the angle CA² CA³ CB² CB³ CD be conjugate CD³ central conic centre chord PQ chords project concyclic cone conjugate diameters conjugate hyperbola conjugate radii constant ratio CP² CP³ diameters at right draw drawn eccentricity ellipse equally inclined fixed point focal chord focal perpendicular focal radii foci focus intercepted intersection latus rectum meet the asymptotes meet the axis meet the curve meet the directrix middle point minor axis normal Orthogonal Projection parabola parallel chords parallelogram plane PN² point Q principal ordinate projection PROP QV² radius rectangular hyperbola right angles right-angled triangles Shew shewn similar triangles straight line joining subtend equal angles subtends a right supplementary angles tangent at Q vertex vertices