A | B |

Right Angle | An angle that measures exactly 90 degrees |

Straight Angle | An angle that measures exactly 180 degrees |

Acute Angle | An angle that measures less than 90 degrees |

Obtuse Angle | An angle that measures between 90 and 180 degrees |

Congruent Angles | Two angles that have the same measure |

Vertex | The endpoint where two rays meet, forming an angle |

Bisect | To separate an angle into two congruent angles |

Degrees | The unit that angles are measured by |