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.