Jib or trysail.
it is called a flying jib
The jibsail or spinnaker sail.
a ship with triangular sails that allowed it to sail into the wind and with square sails that carried it forward when the wind was at it's back.
the caravel has triangular sails as well as square sails. Square sails carried the ship forward when the wind was at its back. Triangular sails allowed the caravel to sail into the wind. the caravel was better than other euoopean ships of the time at this type of sailing
"Square-riggers" have primarily square sails, but the jib sails are triangular.
Sloops, ketches, and yawls have triangular-shaped sails.
Square sails are square
They were referred to as "four-cornered" sails.
The boat had triangular sails.
Square sails (rectangular) were (are) called four-cornered sails.
The boat was small and had two triangular sails.
caravel