Cut-The-Knot Action 9!

Author:Tim Brzezinski

Creation of this applet was inspired by a tweet from Alexander Bogomolny. Note the rectangles shown are similar to each other. How can you formally prove what this applet informally illustrates?

New Resources

Pelecoid
Stairs (Optical Illusion)
Cross Product in 2D and 3D
Introduction
Limaçon / Cardioid as a Locus - A Classical Construction

Discover Resources

Graphing quadratic equations
C0603X52EulersMethod
Untitled
Animacion
Generalizing

Discover Topics

General Quadrilateral
Dilation
Prism
Hypothesis Testing
Intersection