decagon
A polygon have 4 or more sides. It has no gaps between it. Regular polygons usually have six or ten sides.
Regular polygons are named based on the number of their sides. For example, a triangle has three sides, a square has four, a pentagon has five, and a hexagon has six. As the number of sides increases, the names continue with heptagon (seven), octagon (eight), nonagon (nine), and decagon (ten). Beyond ten sides, polygons are often referred to by their Greek numerical prefixes, such as dodecagon for twelve sides, and so forth.
There is no special name: they are polygons, as are shapes with 3 or 3 million sides.
pentagon (5 sides) hexagon (6 sides) heptagon ( 7 sides) octagon (8 sides) nonagon (9 sides) decagon (10 sides)
The first ten polygons in order of names and sides are as follows:- Triangle has 3 sides Quadrilateral has 4 sides Pentagon has 5 sides Hexagon has 6 sides Heptagon has 7 sides Octagon has 8 sides Nonagon has 9 sides Decagon has 10 sides Undecagon has 11 sides Dodecagon has 12 sides
A regular decagon.
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''Decagon'' is any polygon with ten sides and ten angles ''Regular decagon'' is a polygon with ten sides of equal length and all angles equal to 144°
Ten of them.
The name of a regular polygon, with ten equal sides and ten equal angles, is a decagon, from the Greek word "deka", meaning ten.
The shape is called a decagon. If all the sides and angles are the same, it is called a regular decagon.
A shape with three sides is called a triangle. A shape with ten sides is called a decagon.