Rhombus | | parallelogram with all congruent sides |

Pentagon | | a polygon with six sides |

Obtuse Triangle | | a triangle with no congruent sides |

Acute Triangle | | a triangle with one right angle |

Parallelogram | | a triangle with one angle greater than 90 degrees |

Equilateral Triangle | | a simple closed figure formed by three or more line segments |

Triangle | | a parallelogram with four right angles |

Polygon | | a polygon with eight sides |

Hexagon | | a triangle with three congruent sides |

Right Triangle | | a triangle with at least two congruent sides |

Scalene Triangle | | a polygon with three sides |

180 degrees | | a triangle with three angles that are less than 90 degrees |

Trapezoid | | a quadrilateral with 2 pairs of parallel sides |

Square | | the sum total of the three angles of any triangle |

Octagon | | a polygon with five sides |

Congruent | | figures that have the same size and shape |

Rectangle | | a parallelogram with congruent sides and congruent angles |

Quadrilateral | | quadrilateral with exactly one pair of parallel sides |

Decagon | | a polygon with four sides |

Isosceles Triangle | | a polygon with ten sides |