![]() ![]() The different types of the polygon are based on its number of sides and angles. What are the Different Types of Polygons? In a polygon, if there are n sides then there will be n vertices. It is also known as the corners of a polygon. The figures given below are some examples of a polygonĪ vertex is a point where the line segments of a polygon meet each other. For example, a polygon of three sides and three angles is known as a triangle whereas a polygon of four sides and four angles is known as a quadrilateral. The classification of a polygon is described on the basis of its number of sides and vertices. The corners or points where two line segments meet each other is known as the vertex of a polygon. A minimum of three line segments is needed to draw any closed figure. ![]() The line segment which is used to make a polygon is known as polygon sides or edges. The word polygon is derived from the Greek language where “poly” means many and ‘gonna’ means ‘angle’. See our pages on circles and curved shapes for more.In Geometry, a polygon is a flat or plane, the two-dimensional closed figure made up of line segments. Any other polygon is an irregular polygon, which by definition has unequal length sides and unequal angles between sides.Ĭircles and shapes that include curves are not polygons - a polygon, by definition, is made up of straight lines. There are two main types of polygon - regular and irregular.Ī regular polygon has equal length sides with equal angles between each side. There are names for many different types of polygons, and usually the number of sides is more important than the name of the shape. The ‘poly-‘ prefix simply means ‘multiple’, so a polygon is a shape with multiple sides, in the same way that ‘polygamy’ means multiple spouses. An Olympic heptathlon has seven events – a heptagon has seven sides.The modern pentathlon has five events – a pentagon has five sides.A decade is ten years – a decagon has ten sides.An octopus has eight legs – an octagon has eight sides.These can sometimes be useful in helping you remember how many sides a polygon has. The Greek numerical prefix occurs in many names of everyday objects and concepts. The names of polygons are derived from the prefixes of ancient Greek numbers. One with one obtuse angle and two acute angles is called obtuse (obtuse-angled), and one with a right angle is known as right-angled.Įach of these will also be either equilateral, isosceles or scalene. ![]() The internal angles of a triangle always add up to 180°.Ī triangle with only acute internal angles is called an acute (or acute-angled) triangle. Triangles can also be described in terms of their internal angles (see our page on Angles for more about naming angles).
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