classification of polygons with shape

Classified by Measuring the Angles

• Regular Polygon: Polygon in which all the sides of angle are same and all the interior angle of the polygon are equal is called regular polygon.
• Irregular Polygon: The polygon in which is not regular a polygon is known as Irregular Polygon. Irregular polygons do not have equal sides and measure of angles.
• Convex Polygon: The polygon whose measure of an interior angle is less than 180° is termed as a convex polygon. The vertices of a convex polygon are always outwards.
• Concave Polygons: In concave polygons, at least one angle measures more than 180°. Those polygons which are not convex are concave polygons.
• Quadrilateral Polygons: Quadrilateral polygons are the polygons which are four-sided or with four angles i.e. quadrangle. Every polygon which forms four angles is known as quadrilateral polygons.
• Pentagon Polygons: The polygon which consists of five sides is termed as pentagon polygon.

Classified by Measuring the Sides

• Triangle: The three-sided polygon is known as the triangle.
• Quadrilateral: Any figure which is a closed four-sided figure is known as a quadrilateral.
• Pentagon: The closed figure which is formed by five straight lines is known as a pentagon.
• Hexagon: The six-sided polygon is known as a hexagon.
• Heptagon: The polygon with seven sides is termed as a heptagon.
• Octagon: As the name says, the Eight-sided polygon is known as Octagon.
• Nonagon: The polygon which possesses nine straight lines is known as nonagon.
• Decagon:  The closed figure made with ten straight lines is termed as decagon polygon.