The Incomplete Triangle was created on 2004-04-06.
Incomplete - album - was created in 1998.
The Incomplete Enchanter was created in 1941.
Incomplete Eclipse was created in 1982.
The Incomplete Glenn Tilbrook was created in 2001.
The question appears to be incomplete, but an equilateral triangle, seems to fit the answer.
The Triangle - newspaper - was created in 1926.
Triangle Link was created in 2000.
Triangle Studios was created in 2005.
Triangle Service was created in 2003.
The Fateful Triangle was created in 1983.
The Dark Triangle was created in 1979.
Triangle Expressway was created in 2011.