\fQuadric Surfaces (Some forms): 1. Sphere (d) Hyperbolic x2+ 12+ 22 =12 Ax- - By- =1 2. Ellipsoid 5. Hyperbolic (a) One Sheet Ax2 + By' + CZ' = 1 Ax2 + By2 - Cz' = 1 3. Cone (b) Two Sheets Ax + By = Cz - Ax2 - By- + Cz' = 1 4. Cylinder 6. Paraboloid (a) Circular (a) Hyperbolic x+1=r Ax2 - By= = Cz (b) Elliptic (b) Circular Ax- + By = 1 x+ y =z (c) Parabolic (c) Elliptical x- = z Ax- + By = Cz