# Lambert quadrilateral

> quadrilateral with three right angles

**Wikidata**: [Q4117142](https://www.wikidata.org/wiki/Q4117142)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Lambert_quadrilateral)  
**Source**: https://4ort.xyz/entity/lambert-quadrilateral


## References

1. Freebase Data Dumps. 2013