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Quadric Surfaces

Ellipsoid: #

The equation of an ellipsoid is:

$$ { x^2 \over a^2 } + { y^2 \over b^2 } + { z^2 \over c^2 } = 1 $$

Elliptic paraboloid: #

The equation of an elliptic paraboloid is:

$$ {x^2 \over a^2} + {y^2 \over b^2} =z $$

Hyperbolic paraboloid: #

The equation of a hyperbolic paraboloid is:

$$ {x^2 \over a^2} - {y^2 \over b^2} = z $$

Hyperboloid of one sheet: #

The equation of a hyperboloid of one sheet is:

$$ {x^2 \over a^2} + {y^2 \over b^2} - {z^2 \over c^2} = 1 $$

Hyperboloid of two sheets: #

The equation of a hyperboloid of two sheets is:

$$ {x^2 \over a^2} + {y^2 \over b^2} - {z^2 \over c^2} = - 1 $$

Sources #