A polygon is any closed curve consisting of a set of line segments (sides) connected such that no two segments cross. The simplest polygons are triangles, quadrilaterals, and pentagons.
Poly- means "many" and -gon means "angle". A stop sign is an example of a regular polygon. It has eight equal sides and angles, making it a regular octagon. Can you think of more polygons in real life? A regular polygon has all angles equal and all sides equal. Otherwise it is irregular.
As shown in the above image, the most basic types of polygons found in everyday life are: 1) triangle, 2) quadrilateral, 3) pentagon, 4) hexagon, 5) heptagon, 6) octagon, 7) nonagon, and 8) decagon.
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.
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.
Polygons are generally denoted by n-gon where n represents the number of sides it has, For example, a five-sided polygon is named as 5-gon, a ten-sided is named as 10-gon, and so on.
Review the term polygon and name polygons with up to 8 sides. Then, try some practice problems.
This anchor chart is a great reference tool for students learning about 2-D shapes, or polygons, as well as their vertices and sides. The printable features examples of a square, circle, rectangle, triangle, oval, rhombus, trapezoid, pentagon, hexagon, and octagon; and shows how many vertices and sides each shape has.