An undecagon
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Fourteen. Each polygons has the same number of sides as it has vertices. Therefore, a polygon with 14 vertices must have 14 sides.
A polygon with 5 sides/vertices is called a pentagon.
dodecagon * * * * * No, a dodecagon has 20 vertices! One possible answer is a pyramid whose base has 11 sides.
12 sides, 12 angles, 12 vertices
19. sides=vertices