Angles can be classified according to their measurement:

Name | Definition | Example |
---|---|---|

Acute angle | An angle measuring less than 90° | |

Right angle | An angle measuring exactly 90° | |

Obtuse angle | An angle measuring more than 90° but less than 180° | |

Straight angle (or flat angle) | An angle measuring exactly 180° | |

Reflex angle | An angle measuring greater than 180° but less than 360° | |

Full angle | An angle measuring exactly 360° |