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List of two-dimensional geometric shapes

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This is a list of two-dimensional geometric shapes in Euclidean and other geometries. For mathematical objects in more dimensions, see list of mathematical shapes. For a broader scope, see list of shapes.

Generally composed of straight line segments

Main article: Polygon

Angle
Balbis
Concave polygon
Constructible polygon
Convex polygon
Cyclic polygon
Equiangular polygon
Equilateral polygon
Penrose tile
Polyform
Regular polygon
Simple polygon
Tangential polygon

Polygons with specific numbers of sides

Triangle – 3 sides
- Acute triangle
- Equilateral triangle
- Heptagonal triangle
- Isosceles triangle
  - Golden Triangle
- Obtuse triangle
- Rational triangle
- Heronian triangle
  - Pythagorean triangle
  - Isosceles heronian triangle
  - Primitive Heronian triangle
- Right triangle
  - 30-60-90 triangle
  - Isosceles right triangle
  - Kepler triangle
- Scalene triangle
Quadrilateral – 4 sides
- Cyclic quadrilateral
- Kite
  - Rectangle
  - Rhomboid
  - Rhombus
  - Square (regular quadrilateral)
- Tangential quadrilateral
- Trapezoid
  - Isosceles trapezoid
- Trapezus
Pentagon – 5 sides
Hexagon – 6 sides
- Lemoine hexagon
Heptagon – 7 sides
Octagon – 8 sides
Nonagon – 9 sides
Decagon – 10 sides
Hendecagon – 11 sides
Dodecagon – 12 sides
Tridecagon – 13 sides
Tetradecagon – 14 sides
Pentadecagon – 15 sides
Hexadecagon – 16 sides
Heptadecagon – 17 sides
Octadecagon – 18 sides
– 19 sides
Icosagon – 20 sides
Icosikaihenagon - 21 sides
Icosikaidigon - 22 sides
Icositrigon - 23 sides
Icositetragon - 24 sides
Icosikaipentagon - 25 sides
Icosikaihexagon - 26 sides
Icosikaiheptagon - 27 sides
Icosikaioctagon - 28 sides
Icosikaienneagon - 29 sides
Triacontagon - 30 sides
Tetracontagon - 40 sides
Tetracontakaienneagon 49 sides
Pentacontagon - 50 sides
Hexacontagon - 60 sides
Heptacontagon - 70 sides
Heptacontapentagon - 75 sides
Octacontagon - 80 sides
Enneacontagon - 90 sides
Hectogon - 100 sides
Dihectogon - 200 sides
Trihectogon - 300 sides
Tetrahectogon - 400 sides
Pentahectogon - 500 sides
Hexahectogon - 600 sides
Heptahectogon - 700 sides
Octahectogon - 800 sides
Enneahectogon - 900 sides
Chiliagon - 1,000 sides
Dischiliagon - 2,000 sides
Trischiliagon - 3,000 sides
Myriagon - 10,000 sides
Megagon - 1,000,000 sides
Star polygon – there are multiple types of stars
- Pentagram - star polygon with 5 sides
- Hexagram – star polygon with 6 sides
  - Star of David (example)
- Heptagram – star polygon with 7 sides
- Octagram – star polygon with 8 sides
  - Star of Lakshmi (example)
- Enneagram - star polygon with 9 sides
- Decagram - star polygon with 10 sides
- Hendecagram - star polygon with 11 sides
- Dodecagram - star polygon with 12 sides
Apeirogon - generalized polygon with countably infinite set of sides

Curved

Main article: List of curves

Composed of circular arcs

Annulus
Arbelos
Circle
- Archimedes' twin circles
- Bankoff circle
- Circular triangle
  - Reuleaux triangle
- Circumcircle
- Disc
- Incircle and excircles of a triangle
- Nine-point circle
Circular sector
Circular segment
Crescent
Lens, vesica piscis (fish bladder)
Lune
Quatrefoil
Reuleaux polygon
- Reuleaux triangle
Salinon
Semicircle
Stadium
Tomahawk
Trefoil
Triquetra

Not composed of circular arcs

Archimedean spiral
Astroid
Cardioid
Deltoid
Ellipse
Various lemniscates
Oval
- Cartesian oval
- Cassini oval
- Oval of Booth
Superellipse
Taijitu
Tomoe
Magatama

References

ar:قائمة الأشكال الهندسية it:Elenco strutturato di forme geometriche sv:Geometrisk figur

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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