Triangular sails, also known as lateen sails, are a type of sail that is shaped like a triangle. They are typically rigged on a long yardarm and are used on various types of boats, especially in Mediterranean and Arab sailing traditions. The triangular shape allows for better maneuverability and efficiency when sailing against the wind. These sails are advantageous because they can catch wind from different angles, making them versatile for various sailing conditions. Triangular sails are often seen on dhows and other traditional vessels, contributing to their unique design and sailing capabilities.