Region enclosed by two
Cylinders |

Hyperbolic Paraboloid above a Disc |

Circles Tangent to Two
Fixed Circles on a Sphere |

Graph of cos 2t Wrapped
around a Cylinder |

A Surface with Horizontal
Cross Sections Formed by Ellipse |

Hyperbolic Paraboloid
above a Disk |

Hyperbolic Paraboloid
above a Square |

Colorful Ice Cream |

Möbius Band |

Region Enclosed by Two Parabolic
Cylinders |

Ribbon |

A Ruled Surface |

Spiral |

Torus |

Torus Formed with Horizontal Circles |

Unknown |

Villarceau Circles |