The rectangular part of a chair on which you are sitting is an example of a polygon.Trusses are triangular in shape, while walls are rectangular shaped. The truss of a building or bridge, the walls of a building, etc., are examples of polygons.The tiles that you walk on are squared in shape, which implies that they are polygons.Shapes have a wide application in real-life applications. Understanding shapes is important in geometry. A Decagon has 10 sides, just like a Decimal point has 10 digits.The terms Nonagon and Nine both start with the letter N.The Washington DC in the US has 5 sides (Pentagon).A QuadBike has 4 wheels and thus a quadrilateral.
The following are a few mnemonics to help remember the names of some polygons: A concave polygon can have at least four sides-the vertex points towards the inside of the polygon. If one or more interior angles of a polygon are more than 180 degrees, it is known as a concave polygon. The vertex of a convex polygon always points outwards from the center of the shape. This is a type of polygon with all the interior angles strictly less than 180 degrees.
Hectagon: Has 100 equal sides and 100 equal angles.Īn irregular polygon is a polygon with a different measure of angles and side lengths. Icosagon: Has equal sides and 20 equal angles. Octakaidecagon: Has 18 sides and angles. Hexakaidecagon: has 16 sides and angles. Pentadecagon: A pentadecagon is a regular polygon with 15 equal sides and 15 same angles. Tetrakaidecagon: Has 14 equal sides and 14 same angles. Triskaidecagon: Has 13 equal sides and 13 same angles. 
Dodecagon: a regular polygon with 12 equal sides and 12 same angles.Hendecagon: Has 11 equal sides and 11 equal angles.Nonagon: Has 9 equal sides and 9 same angles.The best real-life example of an octagon is the STOP road sign.
Octagon: An octagon has 8 equal sides and 8 equal angles. Heptagon: A regular polygon with 7 equal side lengths and 7 same angles. Hexagon: A regular polygon that has 6 equal sides and 6 equal angles. Pentagon: A polygon that has 5 equal sides and angle. Rhombus: A special type of parallelogram in which all four sides are the same length, like a square that has been squashed sideways. Kite: Two pairs of adjacent sides are of equal length the shape has an axis of symmetry.Į. Parallelogram: Opposite sides are parallel, opposite sides are equal in length, opposite angles are equalĭ. A square: A quadrilateral whose 4 sides are equal and four angles are all 90 degrees each.Ĭ. A quadrilateral is a regular polygon with four angles and four sides. A triangle: An equilateral triangle is a regular polygon with three equal side lengths and three equal angles. There are different types of regular polygons. Types of Polygonsĭepending on the sides and angles, the polygons are classified into different types, namely,Ī regular polygon is a polygon in which all the interior angles are equal, and also, all the sides are equal. Now that you have understood what a polygon is let us explore the different polygons and how they look. The concept of polygons was generalized in 1952 by Geoffrey Colin. Thomas Bradwardine was the first known person to study non-convex polygons in the 14 th century. Greeks studied non-convex regular polygon in 7 th century BC on a krater by Aristophanes. Polygons were known to human beings since ancient times. Note: Circles, three-dimensional objects, any shapes that include curves, and any shapes that aren’t closed are not polygons. In simple words, polygons are plain figures or shapes made up of line segments only. The most common examples of polygons are the triangle, the rectangle, and the square. The term polygon originates from the Greek word “poly -” meaning “many” and “- gon,” meaning “angles.” In mathematics, a polygon is a closed two-dimensional figure made up of line segments but not curves. What polygons are, and how do they look like. A pizza slice is triangular in shape, hence, a polygon. You see a wall, which is rectangular in shape, is a polygon.Ī front view of a dice, which has a square shape, is a polygon. Have you heard about a polygon? Well, polygons are all around us! Most of the common shapes that you see or study every day are polygons.
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