11 sided shape name3/16/2024 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.įollow our Number Sense blog for more math activities, or find a Mathnasium tutor near you for additional help and information. These are all names for a polygon that has 11 sides and 11 angles. These include pentagon which has 5 sides, hexagon has 6, heptagon has 7, and octagon has 8 sides. A shape that has 11 sides is called a hendecagon, undecagon, or an endecagon. 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. There are names for other shapes with sides of the same length. 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. 11 and 12 sided shape: 11 -Sided shape: Any polygon of 11 sides is known as hendecagon or Unidecagon. 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. Printable Shapes - 2D and 3D Shape Sheets Parts of a Circle Worksheets and Support. Regular heptagons have sides of equal length and interior angles of 128.57 degrees. recognise and name a range of 2d and 3d shapes recognise regular and irregular shapes. 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. The US Department of Defense headquarters is named 'the Pentagon'. 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. Find out the rules and properties of regular, concave and complex polygons, and play with interactive polygons online. 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. Learn how to identify and name polygons with 11 sides, such as the 11-gon, the 12-gon, the 13-gon and the 14-gon. Learn to recognise the geometric shapes with up to 20 sides in this this fun educational video with colourful animated shapes You will learn to identify the.
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