__ | 1. | Equilateral triangle | | A. | A quadrilateral with one pair of parallel sides |

__ | 2. | Hexagon | | B. | Point where two sides of a polygon meet |

__ | 3. | Isosceles triangle | | C. | A polygon with six sides |

__ | 4. | Octagon | | D. | A special rectangle with all sides of equal length |

__ | 5. | Pentagon | | E. | A polygon with five sides |

__ | 6. | Perpendicular Lines | | F. | A triangle with two or more sides of equal length |

__ | 7. | Scalene triangle | | G. | Two lines that form a right angle when they meet |

__ | 8. | Square | | H. | A polygon with eight sides |

__ | 9. | Trapezoid | | I. | A triangle with all sides of equal length |

__ | 10. | Vertex | | J. | A triangle with no equal side lengths |