Quadrilateral Surprise!

Auteur :Tim Brzezinski

How would you put this property (dynamically illustrated below) into words? (Applet works best if quadrilateral is kept convex.) How can you formally prove what this applet informally illustrates?

Quick (Silent) Demo

Nouvelles ressources

Congruent Sides & Angles in △s: Exploration
Linear Equation Graphs: Thin Slice
Pythagorean Template: Integer Legs
Function art 3D - waiting shed (v2)
希尔伯特曲线

Découvrir des ressources

Graphs from the unit circle
ล่องลอย
city
Triangle Medians Investigation
segno

Découvrir des Thèmes

Vecteurs 2D (dans le Plan)
Cylindre
Cercle Circonscrit
Moyenne Géométrique
Cercle Unité