Varignon's Theorem Animation
Move points A, B, C, or D to begin.
1) What are points E, F, G, and H?
2) What do the colors (red, blue . . . ) signify?
3) What is the yellow point tracing?
4) Why are the marked segments parallel?
5) What other relationships are there?
6) How small is the interior shape compared to quadrilateral ABCD?