Quadrilateral Surprise!

作者: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

新资源

Graphing 1 + cos(θ) in Polar Coordinates
Adding Decimal Numbers and Shortest Path Strategies
Nikmati Keunggulan Di Bandar Judi Terpercaya
立体几何-公理3及推论
apec

发现资源

mátrixok
"parallelogram" with only 2 equal opposite sides
Exponential Decay f(x + h)
ClintonJ-Triangle1

发现主题

几何
数列和级数
反射
正弦
函数图象