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

Padel rebound angle (ignoring spin)
Translation of the Graph of a Function
Difference engine Babbage vb 2
အခြေခံ data အခေါ်အဝေါ်များ
functionartculture

Discover Resources

Domain & Range
Demo Worksheet
Parallel lines by Angle Copy
Untitled
Euler Line

Discover Topics

Circle
Trigonometry
Centroid or Barycenter
Differential Calculus
Differential Equation