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. Bowler |
| February 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 © 1996-2009 Alexander Bogomolny
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