Geometry and Other Areas of Mathematics
- Annulus (mathematics)
- Apollonian circles
- Apollonian gasket
- Arbelos
- Archimedean circle
- Archimedes' circles
- Archimedes' quadruplets
- Area of a disk
- Bankoff circle
- Thomas Baxter (mathematician)
- Belt problem
- Bertrand's paradox (probability)
- Bicentric quadrilateral
- Bipolar coordinates
- Bonnesen's inequality
- Borromean rings
- Brahmagupta's formula
- Brocard circle
- Buffon's needle
- Butterfly theorem
- Carnot's theorem
- Casey's theorem
- Centered trochoid
- Circle
- Central angle
- Circle bundle
- Circle graph
- Circle group
- Group of rational points on the unit circle
- Circle map
- Circle packing
- Circle packing in a circle
- Circle packing in an equilateral triangle
- Circle packing in an isosceles right triangle
- Circle packing theorem
- Circles of Apollonius
- Circle of antisimilitude
- Circular algebraic curve
- Circular distribution
- Circular sector
- Circular segment
- Circular statistics
- Circular surface
- Circumference
- Circumscribed circle — Circumcircle
- Clifford's circle theorems
- Coaxal circles
- Compass and straightedge
- Mohr–Mascheroni theorem
- Poncelet–Steiner theorem
- Concentric
- Concyclic
- Coxeter's loxodromic sequence of tangent circles
- Cyclic quadrilateral
- Cycloid
- Descartes' theorem
- Diameter
- Dinostratus' theorem
- Director circle
- Disk (mathematics)
- Dividing a circle into areas
- Epitrochoid
- Epicycloid
- Cardioid
- Nephroid
- Deferent and epicycle
- Epicycloid
- Equal incircles theorem
- Ex-tangential quadrilateral
- Fermat–Apollonius circle
- Five circles theorem
- Ford circle
- Fuhrmann circle
- Gauss circle problem
- Geometrography
- Generalised circle
- Gershgorin circle theorem
- GEOS circle
- Great circle
- Great-circle distance
- Circle of a sphere
- Hadamard three-circle theorem
- Hardy–Littlewood circle method
- Hawaiian earring
- Homothetic center
- Horn angle
- Horocycle
- Hypotrochoid
- Hypocycloid
- Astroid
- Deltoid curve
- Hypocycloid
- Incircle and excircles of a triangle
- Inscribed angle
- Inscribed angle theorem
- Inscribed circle
- Inversive distance
- Inversive geometry
- Irrational rotation
- Isodynamic point
- Isoperimetric problem
- Japanese theorem for concyclic polygons
- Japanese theorem for concyclic quadrilaterals
- Johnson circles
- Lemoine line
- Lester's theorem
- Limiting cases of Apollonius' problem
- List of topics related to pi
- Lune
- Lune of Hippocrates
- Magic circle (mathematics)
- Malfatti circles
- Measurement of a Circle
- Midpoint-stretching polygon
- Milne-Thomson circle theorem
- Miquel's theorem
- Monge's theorem
- Mean of circular quantities
- Mrs. Miniver's problem
- Nine-point circle
- Osculating circle
- Ortsbogen theorem
- Pappus chain
- Peaucellier–Lipkin linkage
- Pi
- Pivot theorem
- Pizza theorem
- Pole and polar
- Polygon-circle graph
- Poncelet's porism
- Power center (geometry)
- Power of a point
- Problem of Apollonius
- Proof that pi is irrational
- Ptolemy's theorem
- Ptolemy's table of chords
- Quasicircle
- Radical axis
- Radius
- Radius of convergence
- Radius of curvature
- Regiomontanus' angle maximization problem
- Riemannian circle
- Robbins pentagon
- Salinon
- Schoch line
- Schoch circles
- Semicircle
- Seven circles theorem
- Six circles theorem
- Smallest circle problem
- Spieker circle
- Splitting circle
- Squaring the circle
- Squircle
- Steiner chain
- Tammes problem
- Tangent lines to circles
- Tangent circles
- Tangential quadrilateral
- Tarski's circle-squaring problem
- Thales' theorem
- Unit circle
- Versor
- Villarceau circles
- von Mises distribution
- Wigner semicircle distribution
- Woo circles
- Wrapped distribution
- Wrapped Cauchy distribution
- Wrapped normal distribution
Read more about this topic: List Of Circle Topics
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