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

Pitfalls of Disk/Washer Method
רישום חופשי
Making New Year's resolutions for 2026
Untitled
bewijs stelling van Pythagoras

Discover Resources

Line and Point Not on Line
exploration 2-3c
El campo eléctrico y el potencial eléctrico
II-OGRAM FINAL
Untitled

Discover Topics

Percentages
Right Triangles
Upper and Lower Sum or Riemann Sum
Optimization Problems
Means