Cut-the-Knot-Action 13!

Author:Tim Brzezinski

Creation of this applet was inspired by a tweet from Alexander Bogomolny. LARGE points are moveable at any time. How can you formally prove what this applet informally illustrates?

New Resources

Mondrian's Puzzle
Building Triangles with Set Areas
bewijs stelling van Pythagoras
Perimeter of Rectangle
Focus and Directrix

Discover Resources

The Pythagorean Theorem - Moving Point A
Volleyball
What key feature do they share?
กราฟค่าสัมบูรณ์จำนวนเชิงซ้อน (absolute of complex number graphing)
Images of F

Discover Topics

Histogram
Integral Calculus
LCM and GCD
Quadratic Functions
Trigonometric Functions