# Quadratic Surfaces

rename
tanoyese's
version from
2018-02-14 06:58

## Section

Question | Answer |
---|---|

Any two variables (the third undefined) | Cylinder |

(x2+y2+z2 = 4) | Ellipsoid |

(x2+y2-z2 = 5) | Hyperboloid (1 Sheet - Open on opposite signed var) |

(x2-y2-z2 = 5) | Hyperboloid (2 Sheets - Open on opposite signed var) |

(x2+y2-z2 = 0) | Cone |

x2+y2-z=0 | Elliptic Paraboloid (Opens on linear term +=up, -=down) |

x2-y2-z=0 | Hyperbolic Paraboloid (Think of PRINGLES) |

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