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

Constructing the Copy of an Angle + Angles Activities
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bewijs stelling van Pythagoras
Tube moving at distance of a curve.
Trophy (version 2)

Discover Resources

Parallel Lines Cut by a Transversal
Liz's Book
Circle Theorems
Visual of a Single Washer - Calculus

Discover Topics

Interest Calculation
Secant Line or Secant
Geometric Distribution
Differential Equation
Special Points