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# Geometry Terms

### Geometry Terms for 5th grade

Term | Meaning |
---|---|

volume | amount of space inside a 3 dimensional figure |

right triangle | a triangle with 1 right angle and 2 acute angles |

isosceles triangle | a triangle with at least two congruent sides |

edge | line segment where 2 faces of a 3D figure meet |

net | a 2 dimensional pattern of a 3D figure |

prism | a 3D figure with 2 parallel, congruent faces, called bases; at least 3 faces are rectangles |

acute triangle | a triangle with 3 acute angles |

congruent figures | two figures that have the same size & shape |

cubic unit | the unite of measure for volume |

face | a flat surface |

rectangular prism | a closed figure made up of line segments that DO NOT CROSS |

net | a parallelogram with 4 congruent sides |

triangle prism | a prism that has triangular bases |

vertex | the point where 3 or more faces meet on a 3D figure |

bases | two parallel congruent faces in a prism |

cube | a 3D figure with 6 faces that are congruent squares |

attribute | a characteristic of a figure |

regular polygon | a polygon with all sides & anges are congruent |

trapezoid | a quadrilateral with exactly 1 pair of opposite sides |

square | a parallelogram with 4 congruent sides and 4 right angles |

equilateral triangle | a triangle with 3 congruent sides |

parallelogram | a quadrilateral with both pairs of opposite sides being parallel |

congruent angles | angles of a figure that are equal in measure |

scalene triangle | a triangle with NO congruent sides |

3 D figure | a figure that has length, width and height |

rectangular prism | a prism that has rectangular bases |

rectangle | a quadrilateral with 4 right angles; opposite sides are equal & parallel |

unit cube | a cube with a side length of one unit |

composite figure | a figure that is made up of two or more 3D figures |

hexagon | a polygon with 6 sides & 6 angles |

obtuse triangle | a triangle with 1 obtuse angle & 2 acute angles |

congruent sides | sides of a figure that are equal in length |

octagon | a polygon with 8 sides |

pentagon | polygon with 5 sides |

rhombus | a parallelogram with 4 congruent sides |