# Dihedral angles

**URL:** <https://discuss.avogadro.cc/t/dihedral-angles/3304>\
**Category:** General Discussion\
**Created:** [October 5, 2020, 10:15am UTC](https://discuss.avogadro.cc/t/dihedral-angles/3304 "2020-10-05T10:15:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Alexandre\_Magalhaes](https://discuss.avogadro.cc/user_avatar/discuss.avogadro.cc/alexandre_magalhaes/32/717_2.png) [@Alexandre\_Magalhaes](https://discuss.avogadro.cc/u/Alexandre_Magalhaes)\
**Post date:** [October 5, 2020, 10:15am UTC](https://discuss.avogadro.cc/t/dihedral-angles/3304/1 "2020-10-05T10:15:41Z")

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Dear All,

I am using Avogadro 2 in classroom installed in S.O. Linux. I realized that by using the “Measure” tool we get the sign of dihedral angles reversed. I mean, if angle (I,j,k,l) is read in clockwise sense the sign appears negative and, following the current rules, it should be positive. However, I have checked an older version (Avogadro 1.2.0) installed in a S.O. Windows computer and it is O.K.

Regards,  
Alexandre Magalhães

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**Author:** ![ghutchis](https://discuss.avogadro.cc/user_avatar/discuss.avogadro.cc/ghutchis/32/456_2.png) [@ghutchis](https://discuss.avogadro.cc/u/ghutchis)\
**Post date:** [October 7, 2020, 6:03pm UTC](https://discuss.avogadro.cc/t/dihedral-angles/3304/2 "2020-10-07T18:03:44Z")

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Thanks, I’ll take a look.