Some do, most do not.
There's no set material for catamarans. They can be built out of just about anything, wood, plastic, metals.
they do not float
catamarans are the most popular boats
Catamarans are designed for traveling on water, specifically on seas, rivers, and lakes. They are not meant for travel on land or in the air.
Catamarans are good for sailing in shallow waters
Hobie Cats are VERY popular.
Monohull, catamarans, and trimarans.
Catamarans.
20 knots upwind, 33 knots downwind.
Average speed is about 18 knots, depending on the type, structure etc
The aztecs used catamarans , argosys and pontos marias and forlows
Usually fiberglass or wood, but there are catamarans whose hulls are constructed of cement.