The Incomplete Triangle was created on 2004-04-06.
Incomplete Eclipse was created in 1982.
Incomplete - album - was created in 1998.
The Incomplete Enchanter was created in 1941.
The Incomplete Glenn Tilbrook was created in 2001.
The question appears to be incomplete, but an equilateral triangle, seems to fit the answer.
Purple triangle was created in 1938.
Design Triangle was created in 1986.
The Auld Triangle was created in 1954.
Triangle building was created in 2009.
Triangle TV was created in 1998.
Satan's Triangle was created in 1975.
Triangle Link was created in 2000.