Answer: triangular

AnswerCrossword Clue
TRIANGULAR

Like a "Yield" sign

TRIANGULAR

Like jibs

TRIANGULAR

What the long answers all are, more or less

TRIANGULAR
Shape of a lateen sail.
TRIANGULAR
Deltoid.
TRIANGULARLike some sails
TRIANGULARLike sides of pyramids
TRIANGULARLike pool racks
TRIANGULARType of trade