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

Rovnoběžnost rovin
Linear Combination of Vectors
Calculating Arc Length, Radius, and Central Angle
Writing and Graphing Proportional Relationships (k>0)
Squaring a Rectangle (PST Version)

Descubrir recursos

Medians
Geogebra: Substitution
Integral property example
ล่องเรือ
parallelogram

Descubre temas

Semejanza
Funciones logarítmicas
Segmento
Estadística
Números Naturales