Girish Mahajan (Editor)

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.

Contents

Generally composed of straight line segments

  • 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

  • henagon — 1 sided
  • digon — 2 sided
  • triangle
  • acute triangle
  • equilateral triangle
  • isosceles triangle
  • obtuse triangle
  • rational triangle
  • right triangle
  • 30-60-90 triangle
  • isosceles right triangle
  • Kepler triangle
  • scalene triangle
  • quadrilateral
  • cyclic quadrilateral
  • square
  • kite
  • parallelogram
  • rhombus (equilateral parallelogram)
  • Lozenge
  • rhomboid
  • rhomb
  • rectangle
  • square (regular quadrilateral)
  • rectagon
  • quadrangle
  • quadragon
  • tangential quadrilateral
  • trapezus
  • trapezoid
  • isosceles trapezoid
  • pentagon
  • regular pentagon
  • pentagonoid
  • hexagon
  • Lemoine hexagon
  • heptagon
  • octagon
  • regular octagon
  • nonagon
  • decagon
  • regular decagon
  • hendecagon
  • dodecagon
  • hexadecagon
  • icosagon
  • swastika
  • star without crossing lines
  • star polygon
  • hexagram
  • star of David
  • heptagram
  • octagram
  • star of Lakshmi
  • decagram
  • pentagram

    • Composed of circular arcs

  • annulus
  • arbelos
  • circle
  • Archimedes' twin circles
  • Bankoff circle
  • circumcircle
  • disc
  • Incircle and excircles of a triangle
  • nine-point circle
  • circular sector
  • circular segment
  • crescent
  • Indalo
  • lens, vesica piscis (fish bladder)
  • lune
  • Reuleaux polygon
  • Reuleaux triangle
  • salinon
  • semicircle
  • tomahawk
  • triquetra

    • Not composed of circular arcs

  • Archimedean spiral
  • astroid
  • cardioid
  • deltoid
  • ellipse
  • heart (geometry)
  • heartagon
  • various lemniscates
  • oval
  • Cartesian oval
  • Cassini oval
  • Oval of Booth
  • ovoid (shape)
  • superellipse
  • taijitu
  • tomoe, magatama

    • References

    List of two-dimensional geometric shapes Wikipedia
    (Text) CC BY-SA