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# 3D Shapes

### Geometry

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

Place or position on a plane. | Point. |

Part of a line, has one fixed endpoint, and extends infinitely along the line from the end point. | Ray. |

Part of a line that is bounded by two distinct end points, and contains every point on the line between its end points. | Line segment. |

A set of points that extend infinitely in both directions. | Line. |

A flat service that stretches infinitely. | Plane. |

Two lines in a plane meet at _________ point/s or ________ point/s. | One, zero. |

If lines in the same plane do not intersect, we say they are ____________. | Parallel. |

Lines that are in different planes and do not intersect, but are not parallel. | Skew lines. |

Two planes will meet at a ____________. | Line. |

If two planes are parallel and a third plane intersects them, the intersection can be described as _________ ___________ __________. | Two parallel lines. |

If a point is on a plane, there is/are ________ line/s that goes through the point and is perpendicular to the plane. | One. |

Two planes that are __________to the same plane are parallel planes. | Perpendicular. |

Two lines perpendicular to the same plane are ________ __________. | Parallel lines. |

Any flat surface of a three dimensional object. | Face. |

Line segment where two faces intersect. | Lateral edge. |

Point of intersection of three lateral edges. | Vertex. |

Slice of a three dimensional object. | Cross section. |

Two parallel faces in a prism or cylinder. | Base. |

What are the two types of general cylinders? | Cylinders and prisms. |

What are the two types of cylinders? | Right circular cylinders and oblique cylinders. |

What are the two types of prisms? | Right prisms and oblique prisms. |

Three dimensional object with two parallel congruent bases. | General cylinder. |

A general cylinder whose lateral edges are perpendicular to the base. | Right general cylinder. |

A general cylinder whose lateral edges are perpendicular to a polygonal base. | Right prism. |

A general cylinder whose lateral edges are not perpendicular to the polygonal base. | Oblique prism. |

A general cylinder whose lateral edges are not perpendicular to the circular base. | Oblique cylinder. |

A three dimensional solid that tapers smoothly from a flat base to a point generally referred to an apex or vertex. | General cone. |

A general cone with a circular base with the apex or vertex directly over the center of the circular base. | Right circular cone. |

A general cone with a circular bottom with the apex or vertex not over the center of the base, can be circular or irregular. | Non-right circular cone. |

A general cone with a polygonal base with its apex or vertex directly over the center of the base. | (Right) Pyramid. |

A general cone with a polygonal base with its apex or vertex not over the center of the polygonal base. | Non-right pyramid. |

Formula for the surface area of a sphere. | 4πr squared. |

If two general cones have the same ________ _________ and the same ________, then cross-sections for the general cones have the same distance from the vertex and have the same area. | Base area, height. |

Surface area of a sphere. | 4 pi r squared. |

Cavalier's Principle. | If the heights of two solids are the same, and the cross sections of the two solids have the same area, the volumes of the two solids are the same. |

Created by:
emarciante9