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

רישום חופשי
General Polar Equation of Conics with Rotation (1)
apec
အခြေခံ data အခေါ်အဝေါ်များ
Rolling a Square

Discover Resources

Tangent angles
sansauxilaire
JimFactor ICTCM Slider
Moon Phases
Multiplication of two numbers using circles

Discover Topics

Logic
Frequency Distribution
Straight Lines
Vectors 3D (Three-Dimensional)
Addition