Want this question answered?
The boat had triangular sails.
The boat was small and had two triangular sails.
Triangular prism * * * * * No. It is a triangular pyramid or a tetrahedron. A triangular prism has 6 vertices and 5 faces.
A shape that has some triangular faces is a pyramid.
Triangular prism
The triangular sail was invented beginning in the 16th century. They were first seen in the Mediterranean as single yarded lateen sails.
a Lateen Sail
The lateen sail was invented around 100.
The triangular lateen sail dominated the Mediterranean in the Middle Ages. The earliest evidence of it is in the 1st century BCE on a wall painting in Alexandria.
It is called the lateen sail.
Lateen
in polynesia
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.
it was invented in 100 a.d
A lateen sail. Was/is able to be moved left or right. It made/makes ships easier to turn.
I'm not an expert, but I believe you can sail closer to the wind with a lateen-rigged sail than with square sails.
One type is the "lateen sail", but there are also jibs; Genoa & spinnaker.