Editing List of two-dimensional geometric shapes

{{Short description|none}}
This is a list of [[two-dimensional]] [[geometric shape]]s in [[Euclidean geometry|Euclidean]] and other [[geometry|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|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 (mathematics)|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 (geometry)|Kite]]
*** [[Rectangle]]
*** [[Rhomboid]]
*** [[Rhombus]]
*** [[Square (geometry)|Square]] (regular quadrilateral)
** [[Tangential quadrilateral]]
** [[Trapezoid]]
*** [[Isosceles trapezoid]]
** [[Trapezus (geometry)|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
* [[Enneadecagon]] – 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
* [[Pentacontagon]] - 50 sides
* [[Hexacontagon]] - 60 sides
* [[Heptacontagon]] - 70 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
* [[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 (geometry)|Enneagram]] - star polygon with 9 sides
** [[Decagram (geometry)|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|List of curves}}

===Composed of circular arcs===
* [[annulus (mathematics)|Annulus]]
* [[Arbelos]]
* [[Circle]]
** [[Archimedes' twin circles]]
** [[Bankoff circle]]
** [[Circular triangle]]
*** [[Reuleaux triangle]]
** [[Circumcircle]]
** [[disc (mathematics)|Disc]]
** [[Incircle and excircles of a triangle]]
** [[Nine-point circle]]
* [[Circular sector]]
* [[Circular segment]]
* [[Crescent]]
* [[lens (geometry)|Lens]], [[vesica piscis]] (fish bladder)
* [[Lune (mathematics)|Lune]]
* [[Quatrefoil]]
* [[Reuleaux polygon]]
** [[Reuleaux triangle]]
* [[Salinon]]
* [[Semicircle]]
* [[tomahawk (geometric shape)|Tomahawk]]
* [[Trefoil]]
* [[Triquetra]]

===Not composed of circular arcs===
* [[Archimedean spiral]]
* [[Astroid]]
* [[Cardioid]]
* [[deltoid curve|Deltoid]]
* [[Ellipse]]
* Various [[lemniscate]]s
* [[Oval (geometry)|Oval]]
** [[Cartesian oval]]
** [[Cassini oval]]
** [[Oval of Booth]]
* [[Superellipse]]
* [[Taijitu]]
* [[Tomoe]]
* [[Magatama]]

==See also==
*[[List of triangle topics]]
*[[List of circle topics]]
*[[Glossary of shapes with metaphorical names]]

==References==
{{Reflist}}

[[Category:Geometric shapes|2]]
[[Category:Lists of shapes|two-dimensional]]

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