This resource has been contributed by Winpossible, and can also be accessed on their website by - Classifying Polygons.

In this section you'll learn with the help of several examples about the classification of polygons. Polygons are primarily classified according to the number of sides and angles. The number of angles in a polygon always equals the number of sides. E.g. a triangle has 3 sides and 3 angles; a quadrilateral has 4 sides and 4 angles etc. If all the sides and interior angles of a polygon are congruent; then the polygon is a regular polygon, otherwise it is an irregular polygon. Regular polygons can be inscribed by a circle such that the circle is tangent to the sides at the centers, and circumscribed by a circle such that the sides form chords of the circle. Regular polygons are named to indicate the number of their sides or number of vertices present in the figure. Thus, a hexagon has six sides, while an octagon has eight sides. Further, the polygons may be characterized by their degree of convexity i.e. A polygon with no diagonal with points outside the polygon is called a convex polygon and a polygon with at least one diagonal with points outside the polygon is called a concave polygon.

In this section you'll learn with the help of several examples about the classification of polygons. Polygons are primarily classified according to the number of sides and angles. The number of angles in a polygon always equals the number of sides. E.g. a triangle has 3 sides and 3 angles; a quadrilateral has 4 sides and 4 angles etc. If all the sides and interior angles of a polygon are congruent; then the polygon is a regular polygon, otherwise it is an irregular polygon. Regular polygons can be inscribed by a circle such that the circle is tangent to the sides at the centers, and circumscribed by a circle such that the sides form chords of the circle. Regular polygons are named to indicate the number of their sides or number of vertices present in the figure. Thus, a hexagon has six sides, while an octagon has eight sides. Further, the polygons may be characterized by their degree of convexity i.e. A polygon with no diagonal with points outside the polygon is called a convex polygon and a polygon with at least one diagonal with points outside the polygon is called a concave polygon.

This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Geometry. Click on the video below to go through it. If you like it, you can buy our online course in Geometry by clicking here.

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Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.

Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

Classify two-dimensional figures in a hierarchy based on properties.

Understand that positive and negative numbers are used together to describe quantities having opposite directions or values (e.g., temperature above/below zero, elevation above/below sea level, credits/debits, positive/negative electric charge); use positive and negative numbers to represent quantities in real-world contexts, explaining the meaning of 0 in each situation.