# What is a three sided sail?

A three sided sail is known as a Lateen sail or also a triangular sail. With a four sided sail one is only able to sail against the wind, but with a Lateen sail it is possible to sail more directly into the wind.

### What is the name of a four sided triangles name?

A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!