Answer:
A polygon is convex
if all of its edges go outwards rather than inwards.
A convex polygon is a simple polygon whose interior is a convex set.
The following properties of a simple polygon are all equivalent to
convexity.
 Every internal angle is less than 180 degrees or equal to 180
degrees.
 Every line segment between two vertices of the polygon does
not go exterior to the polygon (i.e., it remains inside or on
the boundary of the polygon).
Example of a Convex Polygon:
