Hexagon
polygons
triangel
A polygon.
It has 8 vertices.
None.
Any polygon is.
Any closed polygon could be made using the descriptions above.
polygons
figure
That would be a polygon.
Well a triangle has 3 sides and vertices.
triangel
A polygon.
A Triangle :)
A triangle
I am going to say a line segment. No segments is a line, and one endpoint is a ray.
a triangle