polygon, in geometry, any closed curve consisting of a set of line segments (sides) connected such that no two segments cross. The simplest polygons are triangles (three sides), quadrilaterals (four sides), and pentagons (five sides). If none of the sides, when extended, intersects the polygon, it is a convex polygon. Otherwise, it is concave.
Some polygons of different kinds: open (excluding its boundary), boundary only (excluding interior), closed (including both boundary and interior), and self-intersecting. In geometry, a polygon (/ ˈpɒlɪɡɒn /) is a plane figure made up of line segments connected to form a closed polygonal chain. The segments of a closed polygonal chain are called its edges or sides. The points where two ...
Polygons Polygons are defined as two-dimensional closed shapes that are formed by joining three or more line segments with each other. We tend to encounter polygons mostly while we learn about geometry. In this lesson, let us learn about polygons definition, regular polygons, polygon sides, and the properties of polygons, along with polygon examples and their identification.
Review the term polygon and name polygons with up to 8 sides. Then, try some practice problems.
Polygon properties Below are some properties of all polygons: All polygons are two-dimensional (2D). All polygons are made up of straight sides. The sum of the exterior angles of a polygon is always equal to 360°. If at least one of the interior angles of a polygon is greater than 180°, the polygon is a concave polygon.
Types of Polygons: simple or complex, convex or concave, equilateral, equiangular, regular or irregular, Naming Polygons, Names of Polygons, in video lessons with examples and step-by-step solutions.