Cut The Knot!
by Alex Bogomolny

An interactive column using Java applets

According to the Rules
May 2004

The Parabola
March 2004

Collinearity in Bicentric Quadrilaterals
January 2004

Erro Ergo Disco
December 2003

Mazes
October 2003

A Sampling from a Geometry Collection
September 2003

Bride's Chair
August 2003

Generating Functions
July 2003

The Lepidoptera of the Circles
May 2003

Et tu...
April 2003

The Inversion
February 2003

The Computer as a Magician
January 2003

The Complete Quadrilateral
December 2002

Do You Speak Mathematics?
November 2002

Single Pile Games
October 2002

Napoleon's Propeller
July 2002

Concyclic Circumcenters: A Sequel
June 2002
Concyclic Circumcenters
May 2002
The Puzzlers' Pigeonhole
April 2002
Of Looking and Seeing
March 2002
Students' Social Choice
February 2002
The Constitution and Paradoxes
January 2002
A Case of Similarity
December 2001

Seeing is Believing
November 2001

Necessary and Sufficient
October 2001

The Theorem of Barbier
September 2001

Math Surprises
August 2001

The Parrondo Paradox
June 2001

The Hot Game of Nim
May 2001

Taking Games Seriously
April 2001

The Drills To Play
March 2001

Freaky Links, with William A. McWorter Jr.
February 2001

Why Not Geometry?
January 2001

Cut the Knot! Archives