Geometric shape is a set of points on the plane R² closed with three or more sidess, with one curve or with combinations of them (lines, arcs, circles, elliptical arcs, ellipses, hyperbolas, elliptic curves, ...).
Some geometric shapes are:
- polygon
- bicentric polygon
- concave polygon
- constructible polygon
- convex polygon
- cyclic polygon
- decagon
- dodecagon
- enneagon
- equiangular polygon
- equilateral polygon
- hendecagon
- heptagon
- hexagon
- Lemoine hexagon
- Tucker hexagon
- icosagon
- octagon
- pentagon
- cyclic pentagon
- regular polygon
- regular decagon
- regular dodecagon
- regular hendecagon
- regular hexagon
- regular icosagon
- regular octagon
- regular pentagon
- star figure
- star of Lakshmi
- star polygon
- decagram
- dodecagram
- octagram
- heptagram
- star of David, hexagram
- star of Goliath, nonagram
- pentacle, pentagram
- triangle
- acute triangle
- anticomplementary triangle
- equilateral triangle
- excentral triangle, tritangent triangle
- isosceles triangle
- medial triangle, auxiliary triangle
- obtuse triangle
- rational triangle
- right triangle
- 30-60-90 triangle
- isosceles right triangle
- scalene triangle
- parallelogram
- Penrose tile
- Penrose dart
- Penrose kite
- rectangle
- rhombus, diamond
- Harborth's tile
- square
- trapezium
- isosceles trapezium
- quadrilateral
- cyclic quadrilateral, tetrachord, chordal tetragon ?
- Brahmagupta's trapezium
- equilic quadrilateral
- kite
- rational quadrilateral
- strombus
- tangential quadrilateral, tangential tetragon ?
- trapezoid
- isosceles trapezoid
- cyclic quadrilateral, tetrachord, chordal tetragon ?
- polydrafter
- annulus
- arbelos
- circle
- Archimedes' circle
- Bankoff circle
- circumcircle
- excircle
- incircle
- nine point circle
- circular sector
- circular segment
- lune
- Reuleaux polygon
- rotor
- lens, fish bladder, vesica piscis
- Reuleaux triangle
- salinon
- semicircle
- triquetra
- Yin-Yang
- astroid, paracycle, cubocycloid
- deltoid
- ellipse
- smoothed octagon
- super ellipse