A lateen or latin-rig is a triangular sail set on a long yard mounted at an angle on the mast, and running in a fore-and-aft direction. The settee can be considered to be an associated type of the same overall category of sail.
Byzantine ship rigged with settee sail (miniature from c. 880)
Dhow with lateen sail in "bad tack" with the sail pressing against the mast, in Mozambique.
A large dhow with two settee sail rigs and a headsail.
The Bracera: a traditional lateen-rigged sailboat of the Mediterranean.
A sail is a tensile structure, which is made from fabric or other membrane materials, that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may be made from a combination of woven materials—including canvas or polyester cloth, laminated membranes or bonded filaments, usually in a three- or four-sided shape.
Square rigged frigate
Bermuda-rigged yawl.
Sailing hydrofoil catamaran with wingsail.
Egyptian sailing ship, ca. 1422–1411 BCE