"Can You Really Derive Conic Formulae from a Cone? - Deriving the Symptom of the Parabola - Mathematical Association of America".
سطح مكافئ قطع ناقص قطع زائد مرآة قكع مكافيء "Can You Really Derive Conic Formulae from a Cone? - Deriving the Symptom of the Parabola - Mathematical Association of America".