1
A line segment is a straight line that has an endpoint on both sides (look below). ----
A polygon is a closed 2-D shape with sides made from straight line segments.
There are no polygons (shapes with only straight-line sides) with fewer than three sides, but if you allow shapes with curved sides there are many possibilities. Examples include semicircles, annuli (donut shaped), and crescents.From Caromal, and Izzyk9God just say a CONE!!!
How many of these 30° angles will fit together to make a straight line?
one.