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# 4th Grade Geometry

### Geometry Terms _Kay's mom

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

intersecting lines | lines that cross at exactly one point |

parallel lines | lines that are always the same distance apart and never intersect |

perpendicular lines | lines that intersect that and form 4 right angles |

point | an exact location in a space |

line | a straight path made up points that go on forever in both directions |

line segment | part of a line with 2 endpoints |

ray | a part of a line that has one end point and continues forever in one direction |

angle | formed by 2 rays or 2 line sigments that have the same endpoint |

acute angle | an angle with less than 90' |

right angle | an angle with exactly 90' |

obtuse angle | an angle with more that 90' |

acute triangle | a triangle with 3 acute angles |

obtuse triangle | a triangle with 1 obtuse angle |

right triangle | a triangle with 1 right angle |

quadrilateral | a polygon with 4 sides and 4 angles |

square | 4 sides of equal length, 2 pairs of parallel sides, 4 right angles |

rectangle | 2 pairs of parallel sides opposite sides are equal 4 right triangle |

rhombus | 4 sides of equal length 2 pairs of parallel sides |

parallelogram | 2 pairs of equal length 2 pair pf parallel sides |

trapezoid | 1 pair of parallel sides |

line of symmetry | divides a shape into two parts that are the same size and shape. |

Created by:
dreekaowens