Triangle contains a number of references to other films and in-film references.
- The Shining (1980): In both films, a message is left on a mirror in blood in room 237.
- Friday the 13th Part 2 (1981): The killer wears a sack over their head as Jason does.
- Through The Looking-Glass: After Jess throws the killer overboard, she goes to fix the record player and then she stares at her reflection and then she hears something, the camera then moves through the mirror.
- Jess stares at her reflection at the mirror, but the mirror is shattered, symbolizing a broken state of mind.
- At one point in the film, Greg tells Jess that everything is in her mind.
Out of universe references
- Video Nasties: Moral Panic, Censorship & Videotape (2010) (Video): Title of this film appears on screen.
- Midnight Movie Review: Mr. Horror vs. The Midnight Movie Reviewer (2010) (TV Episode)
as a part of the last year programme
- Slice and Dice: The Slasher Film Forever (2012)
Christopher Smith mentions it. Also, posters and photographs are shown.
- Phelous & the Movies: Triangle (2010) (TV Episode)
movie is reviewed
|Characters||Jess - Greg - Victor - Tommy - Sally - Driver - Downey - Heather|
|Locations||Aeolus (ship) - Miami - Ballroom - Theater - Triangle (sailboat) - Cabin 237 - Harbor - The Armory - Jess's Home - Engine Room - Atlantic Ocean|
|Music||Triangle (Original Motion Picture Soundtrack)|
|Galleries||Triangle (Gallery) - Jess/Gallery - Greg/Gallery - Victor/Gallery - Sally/Gallery - Downey/Gallery - Heather/Gallery - Tommy/Gallery - Driver/Gallery - Posters|
|Greek Mythology||Aeolus (god) - Sisyphus - Thanatos - Hermes - Ares - Persephone|
|Items||Jess's Keys - Remington Model 870 - Kitchen Knife - Fire Axe - Record Player - Mirrors - Jess's Locket - Sledge Hammer|
|Terms/Concepts||Time Loop - Manifestation - Déjà vu|
|Vehicles||Audi 80 B3 - Dodge Ram Van - Ford Crown Victoria - Holden Barina - Kenworth W-924 - Mitsubishi Lancer - Volkswagen Camper|