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

Nowe zasoby

Angle Addition: Warm Up Exercises
bewijs stelling van Pythagoras
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
z`]]
apec

Odkryj zasoby

Rectangles and Triangles
Terre6_G50
Comparing Angle Measures to Side Lengths
Six trig functions
Temperature vs. Time - Multiplication - Sim to Sim - Non 2

Odkryj tematy

Dzielenie
Obrót
Trygonometria
Romb
Prostopadłościan