# law of cosines

> property of all triangles on a Euclidean plane

**Wikidata**: [Q164321](https://www.wikidata.org/wiki/Q164321)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Law_of_cosines)  
**Source**: https://4ort.xyz/entity/law-of-cosines


## References

1. [Nuovo soggettario](http://thes.bncf.firenze.sbn.it/termine.php?id=21832)
2. Freebase Data Dumps. 2013