Type:Interactive, Lesson Plan
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.
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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Keywords:angle triangle number classification video sides polygon pentagon octagon hexagon vertices quadrilateral congruent regular polygon irregular polygon convex polygon concave polygon interior angles geometry tutorials geometry help example quizzes solutions
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