concave
How about the diagonals of a polygon or a transversal line cutting through parallel lines.
A polygon must have at least three sides.
There is no such polygon because a polygon must have at least 3 sides or more.
No, or at least not always.
concave
concave
concave
A concave polygon.
No. a polygon must have at least 3 sides
At least one.
A concave polygon.
How about the diagonals of a polygon or a transversal line cutting through parallel lines.
A polygon must have at least three sides.
I am a quadrilateral, I have 4 vertices, I only have one pair of parallel sides, and I am also a polygon. What am I?
There is no such polygon because a polygon must have at least 3 sides or more.
A polygon with the least number of sides is a triangle (3 sides)