Polygon Classification - Matematica.PT

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Polygon Classification

There are several ways to classify polygons. They can be classified as convex and not convex; as regular or irregular. Polygons are also classified by how many sides they have. The following table lists the different types of polygons, with the name ande major characteristics of the polygons. We also point out that the number of diagonals can be obtained by the following formula: `D = n (n-3) // 2` and the amplitude of the internal angle can be calculated using the following formula: `A = 180 (n-2) // n` (for regular polygons only).

Name	Image	Number of sides	Number of diagonals	Internal Angle(regular polygon)
Triangle		3	0	60º
Quadrilateral		4	2	90º
Pentagon		5	5	108º
Hexagon		6	9	120º
Septagon		7	14	128,6º
Octagon		8	20	135º
Nonagon		9	27	140º
Decagon		10	35	144º
Hendecagon		11	44	147,3º
Dodecagon		12	54	150º
Tridecagon		13	65	152,3º
Tetradecagon		14	77	154,3º

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If you have any pertinent (math) question and you are not able to easily find a answer, then send us a message through the Contact page. We will be happy to respond. In the event that you detect any errors in our summary tables, do not hesitate to let us know! We will try to correct it as soon as possible.

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