Quadrilateral Surprise!

Author: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

New Resources

函數的奇偶性
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
montecarlo circles 5
Select an object for a time to start a command. Light
Untitled

Discover Resources

Reimann Sum Douglas - Lab
比較數量應用題：四年級有學生多少人？
Π1. Εισαγωγικό μάθημα.
Zeroes: Quadratic Polynomial
Describing Reflections of Figures

Discover Topics

Rectangle
Sine
Normal Distribution
Equilateral Triangles
Numbers