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# Geometry

### terms for geometry

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

Triangle | Polygon with 3 sides, 3 angles, and 3 vertices. |

Equilateral Triangle | All 3 sides are congruent. |

Scalene Triangle | None of the 3 sides are congruent. |

Isosceles Triangle | At least 2 sides are congruent. |

Equiangular Angles | All 3 angles are congruent. |

Right Angle | One right angle(90 degrees) |

Acute Angle | All angles are acute(less than 90 degrees) |

Obtuse Angle | One obtuse angle(more than 90 degrees) |

Point | a geometric object that has no dimensions, only a location. |

Plane | Flat surface that extends endlessly in all directions; Two dimensional. |

Space | The set of all points; 3 dimensional. |

Line | A set of points along a straight path having no endpoints. |

Line Segment | Part of a line that has two endpoints. |

Ray | Part of a line hat has only 1 endpoint. |

Angle | Two rays joined with a common endpoint; the two rays are called the sides of an angle. |

Vertex | The common endpoint of an angle. |

Intersecting lines | Lines that have just one point in common. |

Parallel lines | Lines that never intersect. |

Perpendicular lines | Lines that intersect and form right angles. |

Skew lines | Lines that are not in the same plane and do not intersect. |

Degrees | A unit of measure of an angle; measured with a protractor. |

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