Explore how R, G and B make a color, and play a game to see if you can match a color. If you get each within 10, you'll be able to give up and see the answer. Within 10 is good color sense, and hard enough!
More GeoGebra at
TEST R27 M2 BY BRUCE LEE @ OVIN EDUCATION
Show Me The Money
Limit of b to the h minus one over h
medians and altitudes
What is the big deal about midpoints?
Fierbach Circle and Oiler line 3
Vectors 3D (Three-Dimensional)