A | B |

sum of the angles in a hexagon | 720 |

sum of ext angles in a nonagon | 360 |

# of diagonals in a pentadecagon | 90 |

sum of the angles in a heptagon | 900 |

Quad that has = diagonals but only opp = sides | rectangle |

quad that has diagonals perp.,not = | rhombus |

quad with only one pair of parallel sides | trapezoid |

quad that has all sides and angles = | square |