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

Modifiable Right Triangular Prism
Graphing Basic and Compound Inequalities
Segment Addition Postulate (Mild Questions)
Marion's Theorem
Rovnoběžnost rovin

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Circle stuff
פתרון משוואה ריבועית בייצוג מכפלה ומשוואת ישר
DILATASI DAN ROTASI
Completing the Square Using Algebra Tiles
Trapezoid - Interactive

Discover Topics

Percentages
Subtraction
Area
Inequalities
Random Experiments