Regular decagons have sides of equal length and interior angles of 144 degrees.Īn pentadecagon is a 15 sided polygon with interior angles that add to 2340 degrees.Īn icosagon is a 20 sided polygon with interior angles that add to 3240 degrees. Regular nonagons have sides of equal length and interior angles of 140 degrees.Ī decagon is a 10 sided polygon with interior angles that add to 1440 degrees. Regular octagons have sides of equal length and interior angles of 135 degrees.Ī nonagon is a 9 sided polygon with interior angles that add to 1260 degrees. The British 50 and 20 pence coins are curved heptagons.Īn octagon is an 8 sided polygon with interior angles that add to 1080 degrees. Regular heptagons have sides of equal length and interior angles of 128.57 degrees. Regular hexagons have sides of equal length and interior angles of 120 degrees.Ī heptagon is a 7 sided polygon with interior angles that add to 900 degrees. The edible plant okra is shaped like a pentagon.Ī hexagon is a 6 sided polygon with interior angles that add to 720 degrees. In geometry, a polygon ( / pln /) is a plane figure made up of line segments connected to form a closed polygonal chain. The US Department of Defense headquarters is named 'the Pentagon'. Some polygons of different kinds: open (excluding its boundary), boundary only (excluding interior), closed (including both boundary and interior), and self-intersecting. Regular pentagons have sides of equal length and interior angles of 108 degrees. A square is also a type of quadrilateral.Ī pentagon is a 5 sided polygon with interior angles that add to 540 degrees. Examples of regular polygons include the equilateral triangle and square.Ī triangle is a 3 sided polygon with interior angles that add to 180 degrees.Ī square is a 4 sided polygon with interior angles that add to 360 degrees. The following names for polygons have been proposed Undecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon Heptadecagon Octadecagon Enneadecagon. Cuboid: Also known as a rectangular prism, it has six rectangular faces, 12 edges, and eight vertices. Some examples of polyhedra include: Cube: A solid with six square faces, 12 edges, and eight vertices. Regular polygons contain equal side lengths. Polyhedra are 3D shapes with flat faces, straight edges, and vertices. Today's information on 2D polygon shapes comes to us from KidsMathGamesOnline (with some help from Google images!)Ī polygon is a plane (2 dimensional) figure that features at least 3 straight sides and angles.Ī regular polygon has sides which are all the same length as well as angles which are all the same. A polygon is a plane figure enclosed by line segments called sides.
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