Triangular snacks are a popular snack food, and Doritos are one of the most well-known brands. Doritos are a type of triangular-shaped tortilla chips that come in a variety of flavors. They are usually served as a snack or appetizer, and are often accompanied by dips such as salsa or guacamole. Doritos are a favorite among many people, and can be found in most grocery stores and convenience stores.