Online calculator: Triangle angles for given triangle sides

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 singular triange, where side lengths violate
$a+b %3E c$ ,
$b+c %3E a$ ,
$a+c %3E b$ .

the results will be zeroes.

Side a

Side b

Side c

Calculation precision

Digits after the decimal point: 2

Angle alpha (degrees)

Angle beta (degrees)

Angle gamma (degrees)

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