A | B |

polygon | closed plane figure |

vertices | two points of a polygon meet |

point | exact location in space |

line | collection of points that go on and on with no endpoints |

ray | part of a line with one endpoint |

line segment | part of a line with two endpoints |

intersecting lines | lines that pass through the same point |

parallel lines | lines that never intersect |

perpendicular lines | lines that meet at a right angle |

angle | two rays meet at a vertex |

right angle | angle that forms a square |

obtuse angle | more than a right angle |

acute angle | less than a right angle |

pentagon | 5 sided polygon |

hexagon | 6 sided polygon |

octagon | 8 sided polygon |

triangle | 3 sided polygon |

square | 4 sided polygon |