Polygons

• Polygons are a plane figure
• No two sides with a common endpoints are collinear
• Polygons are named by listing its vertices consecutively.
• Each endpoint of a side is a vertex of the polygon
• A polygon is equilateral if all sides are congruent
• A diagonal of a polygon is a segment joining two nonconsecutive vertices.
• The sum of measures of the interior angles of a quadrilateral is 360° called Interior Angles of Quadrilateral
• A polygon is convex  if no line that contains a side of the polygon contains a point in the interior of the polygon, otherwise it is called concave
• A polygon is equiangular if all interior angles are congruent.