# Thales’ theorem

Let $A$ and $B$ be two points and $C$ a point on the semicircle above them. Then the angle $ACB$ is ${90}^{\circ}$.

Title | Thales’ theorem |
---|---|

Canonical name | ThalesTheorem |

Date of creation | 2013-03-22 12:45:24 |

Last modified on | 2013-03-22 12:45:24 |

Owner | mathwizard (128) |

Last modified by | mathwizard (128) |

Numerical id | 6 |

Author | mathwizard (128) |

Entry type | Theorem |

Classification | msc 51-00 |

Related topic | AngleOfViewOfALineSegment |

Related topic | ProvingThalesTheoremWithVectors |

Related topic | AreaOfSphericalCalotteByMeansOfChord |