3/9/2024 0 Comments 7 sided shape nameThe name of a 7-sided polygon is heptagon, which is the 7th term of the list of names of polygons with 7 sides. 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. A polygon is a plane shape with straight sides. 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. Dodecagons can be regular, which mean that all the interior angles and sides. The name of this 12-sided shape comes from the Greek words ‘dodeka’ and ‘hedra’, that mean ‘twelve’ and ‘seat/base’. Basically, a dodecagon is a polygon made up of 12 sides, 12 angles, and 12 vertices. Regular heptagons have sides of equal length and interior angles of 128.57 degrees. A 12 sided shape is a polygon called a dodecagon. 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. 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.
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