They can have irregular or regular sides and are classed as follows:-
1 Triangle has 3 sides
2 Quadrilateral has 4 sides
3 Pentagon has 5 sides
4 Hexagon has 6 sides
5 Septagon has 7 sides
6 Octagon has 8 sides
7 Nonagon has 9 sides
8 Decagon has 10 sides
9 Undecagon has 11 sides
10 Dodecagon has 10 sides
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There are lots of different types of polygons Polygons are classified into various types based on the number of sides and measures of the angles.: Regular Polygons Irregular Polygons Concave Polygons Convex Polygons Trigons Quadrilateral Polygons Pentagon Polygons Hexagon Polygons Equilateral Polygons Equiangular Polygons
All polygons and polyhedra.All polygons and polyhedra.All polygons and polyhedra.All polygons and polyhedra.
That is because an octagon is singular and polygons is plural. An octagon is a polygon, and octagons are polygons but a octagon cannot be a polygons.
Congruent polygons.
1,2,3,4,6,8,12,13,24,26,39,52,78,104,156,and 312.