Geometric shape

Geometric shape

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:

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
- swastika
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

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

equilateral parallelogram
- Lozenge
rhomboid
Wittenbauer's parallelogram

Penrose tile

Penrose dart
Penrose kite

rhombus, diamond

Harborth's tile

isosceles trapezium

cyclic quadrilateral, tetrachord, chordal tetragon ?
- Brahmagupta's trapezium
equilic quadrilateral
kite
rational quadrilateral
strombus
tangential quadrilateral, tangential tetragon ?
trapezoid
- isosceles trapezoid

polydrafter

arbelos

Archimedes' circle
Bankoff circle
circumcircle
excircle
incircle
nine point circle

circular sector

circular segment

lune

Reuleaux polygon

lens, fish bladder, vesica piscis
Reuleaux triangle

salinon

semicircle

triquetra

Yin-Yang

astroid, paracycle, cubocycloid

deltoid

smoothed octagon

super ellipse

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