Chronology of Updates
Note
I have placed chronology of updates for 1996 , 1997 , 1998 , 1999 , 2000 , 2001 , 2002 and 2003 into separate files. Starting with 1997, the most recent entries appear topmost. Besides providing an insight of this site's evolution, chronology updates may be used for word searches.
December 26, 2004
Droz-Farny Circles December 25, 2004
Perpendicular Bisectors in an Inscriptible Quadrilateral II December 24, 2004
Angle Bisectors and Perpendiculars in a Quadrilateral December 23, 2004
Perpendicular Bisectors in an Inscriptible Quadrilateral December 21, 2004
Droz-Farny Line Theorem December 19, 2004
Reflections of a Point on the Circumcircle December 18, 2004
Reflections of a Line Through the Orthocenter December 16, 2004
Reflections of the Orthocenter December 12, 2004
Intersecting Chords Theorem December 10, 2004
Tangent and Secant December 9, 2004
Isogonal and Isotomic Conjugalities December 8, 2004
Squares Inscribed In a Triangle III December 7, 2004
Square Inscribed in a Triangle II December 6, 2004
Cevian Triangle November 29, 2004
Convex Polygon Is the Intersection of Half Planes November 26, 2004
Pedal Polygons November 17, 2004
Sierpinski's Gasket and Dihedral Symmetry November 10, 2004
Rolle's and Mean Value Theorems November 8, 2004
Addition and Subtraction of Functions November 5, 2004
The Length of the diagonal of the unit square equals the square root of 2 November 4, 2004
Suan Pan in Various Number Systems November 3, 2004
Soroban in Various Number Systems November 2, 2004
Three Similar Polygons October 31, 2004
Color Cycling on the Mandelbrot Set October 22, 2004
Venn Diagrams October 14, 2004
Distributive Law October 12, 2004
Circles On Cevians October 9, 2004
Three Similar Triangles II October 8, 2004
Two Squares and Another Square and Directly Similar Figures October 6, 2004
Three Similar Triangles October 5, 2004
Four Circles In a Triangle October 4, 2004
Monotone Number Sequences September 28, 2004
Stick Broken Into Three Pieces (Cartesian Coordinates) September 23, 2004
Proof #44 of the Pythagorean Theorem September 18, 2004
Equilateral Triangles On Sides of a Parallelogram September 17, 2004
Anticomplementary Triangle Surprise September 15, 2004
Three Isosceles Triangles September 14, 2004
A Tool for Constructing Orthogonal Latin Squares September 12, 2004
Tangents and Diagonals in Cyclic Quadrilateral September 10, 2004
Six Circles Theorem (Elkies) September 9, 2004
Six Circles Theorem (Evelyn) September 8, 2004
Stick Broken Into Three Pieces (Trilinear Coordinates) September 5, 2004
Sam Loyd's Son's Dissection September 4, 2004
Langman's Paradox September 3, 2004
Curry's Paradox August 31, 2004
Upgraded Tower of Hanoi August 29, 2004
Monge via Desargues II August 28, 2004
Radical Axis and Center, an Application August 27, 2004
Monge via Desargues August 25, 2004
Counting Triangles August 7, 2004
Radical Center August 6, 2004
Flipping Items Simultaneously II August 5, 2004
Flipping Items Simultaneously July 24, 2004
Cevian Nest July 19, 2004
Wythoff's Nim II July 18, 2004
Grundy's Game July 12, 2004
Segment Trisection July 5, 2004
Upgraded the Farmer and Wife To Catch Rooster and Hen puzzle June 21, 2004
Upgraded the Kayles game June 20, 2004
Rouse Ball's Fallacy June 18, 2004
Four Incident Circles June 17, 2004
Proizvolov's Identity June 15, 2004
Plainim Misère June 12, 2004
Touching Circles June 9, 2004
Symmedian and the Tangents June 8, 2004
Symmedian and 2 Antiparallels June 7, 2004
Symmedian and Antiparallel June 6, 2004
Three Tangents Theorem June 5, 2004
A Tangent in Concurrency June 1, 2004
Chvatal's Art Gallery Theorem May 30, 2004
According to the Rules May 18, 2004
Scoring Misère May 6, 2004
Vecten's Collinearity April 5, 2004
Inversion in the Incircle April 2, 2004
Carnot's Theorem March 28, 2004
Viviani's Theorem March 27, 2004
Nobbs' Points, Gergonne Line March 25, 2004
Tromino Puzzle March 24, 2004
Tiling a Triangulated Hexagon March 22, 2004
Polygons Formed by Perpendicular Bisectors March 21, 2004
Quadrilaterals Formed by Perpendicular Bisectors March 18, 2004
Equilateral Triangles on Sides of a Quadrilateral March 14, 2004
Four Pegs That Form a Square March 7, 2004
The Parabola February 26, 2004
Updated the Twelve Matchsticks Area Puzzle February 25, 2004
Updated the page on solving xx3 = 3 February 14, 2004
Solution to the BiColor Tower of Hanoi puzzle , by N. BowlerFebruary 2, 2004
Collinearity in Bicentric Quadrilaterals February 1, 2004
Projective Collinearity in a Quadrilateral January 31, 2004
Easy Construction of Bicentric Quadrilateral II January 30, 2004
Easy Construction of Bicentric Quadrilateral January 29, 2004
Squares on Sides of a Quadrilateral January 27, 2004
Three Incircles in a Triangle January 25, 2004
Two Quadrilaterals January 24, 2004
Diagonals in a Cyclic Quadrilateral January 21, 2004
Ceva in Circumscribed Quadrilateral January 10, 2004
Zaslavsky's theorem January 4, 2004
Erro Ergo Disco
Copyright © 1996-2008 Alexander Bogomolny
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