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# Proof Justifications

### Common Proof Justifications

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

Definition of Supplementary <'s | 2 <'s are Suppl. iff they sum to 180 |

Definition of < Congruence | m<1=m<2 iff <1 is congruent to <2 |

Definition of < bisector | Ray BD bisects <ABC iff <ABD is congruent to <DBC |

Definition of Complementary <'s | 2 <'s are Comp. iff they sum to 90 |

Definition of Right <'s | an < is right iff m=90 |

Definition of perpendicular | 2 lines perpendicular iff they form 4 right <'s |

vertical < therom | if 2 <'s are vertical, then they are congruent |

Right < Therom | all right <'s are congruent |

Supplement Therom | If 2<'s form a linear pair, they are supplementary |

G: <1+<2 are Suppl. <2+<3 are Suppl. P: <1 is congruent to <3 | <'s suppl. to the same < are congruent |

G: <1+<2 are Comp. <2+<3 are Comp. P: <1 is congruent to <3 | <'s comp. to the same < are congruent |

Created by:
Supercute