Their triangular shape gives the appearance that they were originally cut from circular tortillas. In reality, they are being cut from a continuous sheet of pressed dough using a dandy roller. read more
Doritos are based on traditional nachos. Nachos are made from a round dough, like tortillas, the dough is splitted like a pizza, in four or six “slices” and then deep fried or baked. Also, this shape is better for scoouping salsa and cheese. read more
They weren't exactly triangle shaped. They started out as tortilla wedges. Just like slices of pizza, they aren't triangles. read more
Pizza is round, tortillas are round. Pizza slices are triangular, and doritos (tortilla chips) are triangular. read more