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Types of Polygons

Videos, worksheets, stories and songs to teach Grade 3 students the types of polygons: Triangles, Quadrilaterals, Pentagon, Hexagon, Heptagon, Octagon, Nonagon, Decagon.

A polygon is a closed plane (2-D) figure having three or more straight sides that intersect only at the vertices. Polygons have the same number of sides as vertices. Polygons are identified by their number of sides.

A regular polygon has equal sides and equal angles. An irregular polygon is a polygon whose sides are not all the same length. A circle is not a polygon because it does not have straight line segments.

The following table gives the names of some polygons and examples of regular polygons and irregular polygons. Scroll down the page for more examples, songs and explanations about polygons.

Polygon Song by Peter Weatherall

I am a parallelogram song by Peter Weatherall
Learn the definition of polygon - a very important shape in geometry. When a polygon has a small number of sides, there is a word you use instead of "polygon". We teach you the names of polygons with 3 to 10 sides.

In this catchy song, learn to identify polygons: from triangles to decagons.
Names of Basic Shapes

Naming Polygons
Math Lesson about different types of polygons. Some polygons include triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, and decagon.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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