__ | 11. | all triangles do this | | A. | measures 180 degrees |

__ | 12. | ALL triangles have | | B. | measures 90 degrees |

__ | 13. | a polygon with three sides | | C. | have angles totaling 180 degrees |

__ | 14. | congruent triangles would be | | D. | the same size and the shape |

__ | 15. | it is not possible to have | | E. | sides and angles |

__ | 16. | place where two sides meet | | F. | a triangle with one angle of 181 degrees |

__ | 17. | right angle | | G. | three sides |

__ | 18. | similar triangles may be - | | H. | different sizes but similar shapes |

__ | 19. | straight angle | | I. | triangle |

__ | 20. | triangles are classified by - | | J. | vertex |