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.
The front sail is the jib. The back sail (the one attached to the boom) is the mainsail.
The Vikings' boats had one sail because they also had oars with which to row.
An after-sail is one of the sails on the mizzenmast, or on the stays between the mainmast and the mizzenmast.
There is no set size for a sail. There are standard sizes for many vessels but a boat may have more than one sail and these too, will be different.
A boat with one mast and one sail is called a cat boat. It is an old design with a very shallow draft designed to be used in areas of shallow tidal waters. Usually they a very wide for their length. a sail boat!
One that is as yet unused.
Yes
No one can say who, where or when the first sail was made. Consequently its shape is not know either.
The front sail is the jib. The back sail (the one attached to the boom) is the mainsail.
There are many places where one can get more information about Full Sail University. One can get more information about Full Sail University by visiting popular on the web sources such as the official Full Sail University website and College Prowler.
Sailing options v wind expand, with different sizes of sail; redundancy of systems is acquired, in the event one sail rigging or sail goes down. Maintenance and tending decrease as sails are adjusted for optimum sailing and tending requirements.