Quadrilateral Surprise!

Autor: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

Nuevos recursos

Discriminant of y = ax² + bx + c
Which Quadrilateral is Which?
Parallelogram Linkage
Steel Chair
Tangent Vector (2)

Descubrir recursos

Angle Addition without measurement
Exercise B question 10
SPAIN - Εσωτερικό γινόμενο δύο διανυσμάτων
Relative Maximum
Definition of the Derivative

Descubre temas

Derivada
Triángulos
Gráfica de Funciones
Inecuaciones
Mediana