Cut-the-Knot-Action 13!

Auteur :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?

Nouvelles ressources

Congruent Sides & Angles in △s: Exploration
What Do You See? (2)
bewijs stelling van Pythagoras
Squares Question
Function art 3D - waiting shed (v2)

Découvrir des ressources

Investigation for Parallelograms
HReflectedPoint
Angles in a Semicircle
Mental Arithmetic Target Practice 1
LZ 7.7.6 Building Polygons (Part 1)

Découvrir des Thèmes

Symétrie
Quadrilatères
Pourcentages
Rapports
Graphe de Fonction