Map Coloring with 2 Colors – 1
Map makers color maps so regions sharing a border have different colors. Here is a map where the regions are created by drawing straight lines across the map. Notice how it has been colored using just two colors.
THE CHALLENGE
Color this more complicated map using just two colors.
Notes
THE CHALLENGE
Here is a fun demonstration for coloring maps such as the two on the first page, where the regions are made by a collection of lines. It’s probably best to do this on a whiteboard or some other easily erasable surface.
Start with an empty oval. Now draw a line across it. Lightly darken one side of the line.
Next, draw another line across that. Flip the color used for every region on one side of the line – if it was white, make it dark, and if it was dark, make it light.
Keep adding lines one at a time and flipping all the colors on one side of the line. Do this for as long as your patience holds out. In the end you will have a map that is colored using just two colors!
