Triangle (disambiguation)

The term triangle may refer to:
* Triangle, a three-sided shape
* Triangle (instrument), a musical instrument with a three-sided shape
* Bermuda Triangle, a mysterious place on Earth
* Delta Triangle, a mysterious place in space
* Eternal triangle, a love triangle
* Triangular envelopment, a classic battle posture
;Real world
* Triangle (novel), a novel
* Triangle: Imzadi II, a novel
* The Triangle, a roleplaying game supplement
* The Triangle Campaign, a roleplaying game supplement