# complementary angles

> two angles which sum up to 90 degrees (or π/2 radians)

**Wikidata**: [Q864413](https://www.wikidata.org/wiki/Q864413)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Complementary_angles)  
**Source**: https://4ort.xyz/entity/complementary-angles


## References

1. Freebase Data Dumps. 2013