A triangle can refer to:

• a geometric shape;
• a musical instrument;
• a town in Broome County, New York;
• a town in Prince William County, Virginia; or
• a BBC soap opera.

Triangle can be a local nickname for regions such as

• Bermuda Triangle,
• Polynesian Triangle,
• Sunni Triangle, and
• Research Triangle.

Related terms

• Love triangle
• Pascal's triangle
• Princeton Triangle Club
• Sierpinski triangle
• Trade Trinagle
• Triangle Fraternity
• Triangle inequality
• Triangle offense
• Triangulation
• Trinity