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

分數化百分數：練習
Hypocycloids
z`]]
Involute of the Circle
Padel rebound angle (ignoring spin)

Découvrir des ressources

Manipulálható hóember
dingonoulli
Gradient of Perpendicular Lines 2
Special Quadrilaterals Exploration
Sketch y=a^bx+c

Découvrir des Thèmes

Entiers Naturels
Boîte à Moustaches
Fonctions Polynomiales
Nombres Rationnels
Symétrie