Math Shapes

Elliptical Paraboloid

1 not squared, other 2 squared have same sign

Ellipsoid

all three squared, all positive, equals positive constant

Elliptical Cone

all squared, mixed signs, no constant term

Hyperboloid of 1 Sheet

all squared, two positive, one negative, positive constant

Hyperboloid of 2 Sheets

all squared, one positive, two negative, positive constant

Hyperbolic Paraboloid

two squared with different signs