# Angle and Line Symbols

This is a list of the most common angle and line symbols:

Symbol | Definition | Example |
---|---|---|

\(\triangle\) | triangle | \(\triangle ABC \) |

\(\angle\) | angle | \(\angle ABC = 60^\circ\) |

\(\measuredangle\) | measured angle | \(\angle ABC = 60^\circ\) |

\(\sphericalangle\) | spherical angle | \(\angle AOC = 60^\circ\) |

\(\overleftrightarrow {AB}\) | infinite line distance | |

\(\overline {AB}\) | line segment from A to B | |

\(\overrightarrow {AB}\) | start line at point A | |

\(\overset{\frown} {AB}\) | arc from A to B | |

\(|A-B|\) | distance between A and B | \(|A-B| = 9\) |

\(\parallel\) | parallel to | \(\overline {AB} \parallel \overline {XY} \) |

\(\nparallel\) | not parallel to | \(\overline {AB} \nparallel \overline {XY} \) |

\(\perp\) | perpendicular lines | \(\overline {AB} \perp \overline {XY} \) |