Embedded Files
The Nine-Point Circle
Poristic Locus of the Symmedian Point
Poristic Loci
Loci in Circles
A Midpoint Porism
Incircle and Excircles of a Right Triangle
Pythagoras by Incircle
Pythagoras by Incircle - Locus 1
Pythagoras by Incircle - Locus 2
Pythagoras by Incircle - Locus 3
A Multi-Tangent Circle
Equilateral Triangle by Projection
Morley's Triangles
Angles in a Triangle
The Centroid
The Circumcenter
The Orthocenter
The Incenter and Excenters
Miquel's Theorem
The Euler Line
The Trilinear Polar
The Trilinear Pole
The Trilinear Polar and the Symmedian Point
The Gergonne Point
The Nagel Point
The Bevan Point
The Gergonne Line
The Nagel Line
The Simson Line
Simson Lines
The Steiner Deltoid
The Orthic Axis
The Soddy Line
Feuerbach's Theorem
Feuerbach Points
Morley's Theorem
Conway Circle
The Fermat Point
Napoleon's Theorem
Napoleon's Hexagon
Midpoint Property of the Mixtilinear Incircle
A Property of the Mixtilinear Incircle Tangent Points
The Taylor Circle
The Isotomic Conjugate
The Isogonal Conjugate
Isogonal Conjugate of the Circumcircle
Isotomic Conjugate of the Steiner Circumellipse
Property of the Isogonal Conjugate
Locus of Centers of Equilateral Triangles
Pedal Circles of Isogonal Conjugates
The Orthopole
Nine-Point Circle by Orthopole
Conic by Orthopole
Steiner Ellipses
The Kiepert Hyperbola
The Jerabek Hyperbola
The Feuerbach Hyperbola
The MacBeath Inconic
The Brocard Ellipse
The Van Lamoen Circle
Circumcircle Reflection Property
The Lemoine Axis
First Lemoine Circle
Cosine Circle
Adams' Circle
Incenter/Excenter Lemma
A Property of a Symmedian
Pedal Triangles of Isodynamic Points
Fuhrmann Circle
Soddy Circles
Second Fontene Theorem
The Lester Circle
Cyclocevian Conjugate
A Property of Altitudes
A Note on the Feuerbach Point
The Antiorthic Axis
Collinearity from Perpendicular Bisectors of Angle Bisectors
A Property of the Orthic Triangle
The Schroder Point X(1155)
The Nagel-Schroder Point X(1339)
Point X(79)
Point X(1127)
The Kosnita Point
Anti-Steiner Points
A Property of Perpendiculars
The Euler Line of the Intouch Triangle
A Line Perpendicular to the Euler Line
Point X(403)
Collinear Orthocenters
The Mittenpunkt
Point X(125)
Point X(125) and Euler lines
Line through the Incenter
Line through the Circumcenter
The Brocard Axis
Midpoint Porism Loci
Midpoint Porism - Locus of Incenter/Excenters
Three Lines Meet at the Incenter
Poncelet's Theorem
Poncelet's Theorem and Simson Lines
Poncelet's Theorem - Locus of Orthocenter of Intouch Triangle
Poncelet's Theorem - Loci of Triangle Centers
Poncelet's Theorem - Locus of Isogonal Conjugate
Poncelet's Theorem - Locus of Excenters
Poncelet's Theorem - Antiorthic Axis
Poncelet's Theorem - Trilinear Polar
Point X(187)
Circles Tangent to Circumcircle and Incircle
Circles Tangent to Incircle
Four Centers, Two Parallel Lines
A Property of the Mixtilinear Tangent Point
A Property of the Symmedian Point
A Meeting Inside the Incircle
Fermat Point and Euler Lines
The Neuberg Cubic
Humpty Points
Dumpty Points
Propeller Theorem
The Kiepert Parabola
The Kiepert Conics and Isosceles Triangles
The Stammler Hyperbola
Shawyer's Hyperbola
The Stammler Triangle and Circles
Area Property of the Steiner Inellipse
Inversion and the Mixtilinear Incircles
Harmonic Quadrilaterals
Triangle in Triangle
General Triangle in Triangle
A Trio of Angle Bisectors
Loci of Triangle Centers in a Circle
Fixed Ratio of Triangles
Lucas Circles
Lucas Circles and Symmedian Point
Lucas Circles and Kenmotu Point
Lucas Circles and Lemoine Axis
Lucas Circles and Brocard Axis
Lucas Secondary Tangents Circle
Lucas Circles Extensions
Four Circles in a Triangle
Three Circles in a Triangle
Lucas Common Tangents Circle
Lemoine Axis and Symmedian Point
Bottema's Theorem
Equal Incircles Theorem
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