# Triangle angles for given triangle sides

This calculator computes triangle angles for given triangle sides using cosine law

### This page exists due to the efforts of the following people:

#### Anton

Created: 2011-07-29 21:39:04, Last updated: 2020-11-10 15:37:27

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This calculator computes triangle angles for given triangle sides using cosine law.

Cosine law:
$c^2=a^2+b^2-2ab cos \gamma$,
thus
$\gamma = arccos( \frac{a^2+b^2-c^2}{2ab} )$

For degenerate triangle, where side lengths violate,
$a+b>c$,
$b+c>a$,
$a+c>b$,

the results will be zeroes.

#### Triangle angles for given triangle sides

Digits after the decimal point: 2
Angle alpha (degrees)

Angle beta (degrees)

Angle gamma (degrees)

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