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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.

Polygon Song by Peter Weatherall

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