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

Art and Rotational Symmetry
Rings of circles
Thin Slice: Using Trig Ratios to Solve for Sides of Right Triangles
Polar Reciprocation
Periodic Functions

Discover Resources

undefined
Center of Mass project
lucija 5)
Animation 247
Definición de la parábola

Discover Topics

Parabola
Power Functions
Intersection
Right Triangles
Indefinite Integral