What are two properties of a polygon?

Answer 1

A polygon is 1) a closed figure 2) lying on (in) a plane that 3) is composed of a finite number of (straight) line segments. Let's break it down. Picture a plane. You know. A flat surface of zero thickness and infinite width and length. That plane. Put a triangle on that plane. There's the closed figure. The triangle has the least number of (straight) line segments in its construction. Put a square on the plane. Another polygon. Put a hexagon on the plane. Same thing. Note: these figures we have described are all regular figures. On our plane, any triangle, any quadrilateral, any pentagon, hexagon or n-gon will be a polygon. (And ncannot be infinite.) Are we good? Surf the link to the Wikipedia article on the polygon, even if just for a quick look at the drawing of some representative polygons. The picture is worth a thousand words, and that should allow a viewer to "lock in" the information.