Triangle (Korean: 트라이앵글; RR: Teuraiaenggeul) is a 2009 South Korean-Japanese comedy film starring Ahn Jae-wook, Kang Hye-jung and Lee Soo-kyung.

Ji-young is a beautiful widow of an extremely wealthy family who finds herself attracted to Sang-woo, whom she meets at a ski resort.

Sang-woo is the CEO of a company that arranges art exhibitions, and Ji-young finds him different from the gold diggers who usually come on to her.

He approached her because he has his eye on an art piece called "Galatea's Tears" which is priced at over ₩2 billion.

His attempts are thwarted each time by a woman named Sung-hye who always appears right before he is about to make a crucial move.