math summative

• polygon is a closed plane figure formed by three or more segment
• consecutive sides is a two sides of a polygon that share a common endpoint
• consecutive angles is the common side of two consecutive angle
• included angle is the angle whose vertex is the common endpoint of two consecutive sides
• diagonal is a segment joining any two nonconsecutive vertices
• interior of a polygon- completely encloses a region of a plane
• exterior of a polygon is the points of the plane that are not contained in the polygon region
• concave is the polygonal regions that bend inward
• convex is those that do not bend inwars