A | B |

a triangle with three equal sides | equilateral triangle |

a triangle with three equal angles | equiangular triangle |

a triangle with at least 2 equal sides | isosceles triangle |

a triangle with three angles between 0 and 90 | acute triangle |

a triangle with 1 angle between 90 and 180 | obtuse triangle |

a triangle with 1 right angle | right triangle |

a triangle with no equal sides | a scalene triangle |

a triangle with 3 obtuse angles | does not exist |

a triangle with at least 1 right angle | does not exist |

a triangle with three 60 degree angles and 3 different side lengths | does not exist |