# parallel postulate

> axiom in Euclidean geometry

**Wikidata**: [Q207014](https://www.wikidata.org/wiki/Q207014)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Parallel_postulate)  
**Source**: https://4ort.xyz/entity/parallel-postulate


## References

1. Freebase Data Dumps. 2013
2. [The Pythagorean Theorem is Equivalent to the Parallel Postulate](https://www.cut-the-knot.org/triangle/pythpar/PTimpliesPP.shtml)
3. Hidden harmonies: the lives and times of the Pythagorean theorem