Dara is trying to determine whether a figure is a polygon or not. Her teacher told her that figure is closed,but nothing about the shape of the figure. What else must Dara know to be sure if the figure is a polygon ?

Question

Dara is trying to determine whether a figure is a polygon or not. Her teacher told her that figure is closed,but nothing  about the shape of the figure. What else must Dara know to be sure if the figure is a polygon ?

luap · Answer

should have a vertex and having no curves :D