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# Measurement & Geo

### Vocabulary for Measurement and Geometry Unit Grade 7

Term | Definition |
---|---|

Area | The measure of the amount space contained inside a two dimensional figure; measured in square units. |

Bases | The unique faces of three dimensional figures; for prisms they are congruent and parallel. |

Chord | The distance from a point on the outside of a circle to another point on the outside of the circle without passing through the center. |

Circle | All the points in a plane that are equidistant from a common point called the center. |

Circumference | The measure of the distance around a circle. |

Composite Figure | Any 2d or 3D figure that is composed of different shapes or solids. |

Cross Sections | The two dimensional figures formed by slicing through a solid. |

Cylinder | A solid with two circular bases that are congruent and parallel. |

Cone | A solid with one circular base. |

Diameter | The distance from the outside of a circle, through the center, to another point on the outside of the circle. |

Edges | The lines in which the faces of a polyhedron meet. |

Faces | The two dimensional figures that create three dimensional figures and meet at their edges. |

Lateral Surface Area | The surface area of a solid, excluding the bases. |

Net | The two dimensional representation of a solid. |

Perimeter | The measure of the total distance around a two dimensional figure. |

Pi | The ratio of a circle's circumference to its diameter. |

Polyhedron | A solid whose faces are polygons. |

Prism | A that has two unique congruent bases that are parallel with the rest of the faces being rectangles. |

Pyramid | A solid that has one unique base with the rest of the faces being triangles that meet at one point. |

Radius | The distance from the center to the outside of a circle. |

Solid | Any three dimensional figure. |

Surface Area | The measure of the two dimensional space that covers a three dimensional figure. |

Vertices | The points in which the edges of solids meet. |

Volume | The measure of the amount of space contained inside a three dimensional figure. |

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