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# chapter 5

### classifying triangles

Question | Answer |
---|---|

what is a triangle? | a figured formed by 3 noncollinear points connected by segments. |

what is the vertex of a triangle? | the vertex of each angle is a vertex of the triangle |

what is an isosceles triangle | an isosceles triangle has at least 2 congruent segments and two base angles. |

what is the vertex of an isosceles triangle? | the vertex is the angle formed by the two congruent legs of that triangle and it is opposite of the base |

what is a scalene triangle? | a scalene triangle is a triangle that has no congruent sides. |

what is an equilateral triangle? | an equilateral triangle is a triangle that all the lengths of the segments are congruent. |

are all equilateral triangles also isosceles triangles? | yes! |

what is an acute triangle? | a triangle where all angles are less then 90 degress |

what is an obtuse triangle? | a triangle where one one angle is greater then 90. |

what is a right triangle? | a triangle that has one angle that is 90 degress. |

what is the sum of the measures of the angles of a triangle? | 180 degress |

are the acute angles of the right triangle complementary? what does this mean? | yes, it means that the two angles add up to 90 degress |

what do we know about all three angles in an equiangular triangle? | all three angles are congruent. they all equal 60 degress |

Created by:
mrsjohnsonbasicgeome