Polygons
A polygon is a plain shape with straight sides. Polygons are 2-dimensional. They are made of straight lines, and the shapes are closed (all the lines connect). Some examples of regular polygons are triangles, quadrilaterals, pentagons, hexagons, heptagon, octagon, nonagon and decagon.
When we look at polygons, we look at the number of sides, the number of angles and the number of vertices.
A polygon has many angles as it has sides (they have the same number for sides and angles). For example, a triangle has 3 sides and 3 angles. A pentagon has 5 sides and 5 angles.
A Vertex or the point, is where two lines meet or intersect of an angle.
This link Polygon Basics lists a chart of polygons and shows the number of sides, angles and vertices (please ignore number of diagonals in the third column, we do not need to know it).
Check out this Polygon Matching Game!!
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