Category:Euclidean plane geometry

A

• ► Arbelos‎ (10 P)
• ► Arithmetic problems of plane geometry‎ (8 P)

C

• ► Compass and straightedge constructions‎ (2 P)

E

• ► Elementary geometry‎ (5 C, 82 P)

P

• ► Polygons‎ (5 C, 83 P)

T

• ► Tessellation‎ (5 C, 76 P)

T cont.

• ► Triangle geometry‎ (3 C, 69 P)

*

• Angle trisection
• Compass and straightedge constructions

2

• 2D geometric model

A

• Apollonian circles
• Arrangement of lines

B

• Beck's theorem
• Beta skeleton
• Brahmagupta's formula
• Butterfly theorem

C

• CC system
• Compass equivalence theorem
• Constructible number
• Constructible polygon
• Coxeter's loxodromic sequence of tangent circles
• Crossbar theorem

D

• De Bruijn–Erdős theorem (incidence geometry)
• Descartes' theorem
• Dinostratus' theorem
• Disquisitiones Arithmeticae
• Doubling the cube

E

• Euclidean plane isometry

F

• Fermat number

G

• Gabriel graph
• Gaussian period
• Geometrography
• Golden ratio

H

• Happy Ending problem
• Harmonic division
• Heptadecagon
• Honeycomb conjecture

I

• Inscribed angle
• Internal and external angle

J

• Japanese theorem for cyclic polygons
• Japanese theorem for cyclic quadrilaterals

L

• List of uniform tilings

M

• Mohr–Mascheroni theorem
• Monge's theorem

N

• Napoleon's problem
• Neusis construction

O

• Orchard-planting problem

P

• Pasch's axiom
• Pasch's theorem
• Philo line
• Pick's theorem

P cont.

• Pole and polar
• Polygon
• Poncelet point
• Poncelet–Steiner theorem
• Power of a point
• Problem of Apollonius
• Projective plane
• Pseudotriangle
• Ptolemy's theorem
• Pythagorean theorem

S

• Special cases of Apollonius' problem
• Special right triangles
• Square trisection
• Squaring the circle
• Stewart's theorem
• Sylvester–Gallai theorem
• Szemerédi–Trotter theorem

T

• Tarski's circle-squaring problem
• Thales' theorem
• Tiling by regular polygons

W

• Wallace–Bolyai–Gerwien theorem