[color=#999999][color=#999999]This activity belongs to the GeoGebra book, in Spanish, [i][url=https://www.geogebra.org/m/pc6b4muh]Rompecabezas[/url][/i][/color] [color=#999999](puzzles).[/color][/color][br][br]Try coloring this map using only four colors (red, green, blue and yellow). Each region must have different color than any contiguous region.

[color=#999999]Author of the construction of GeoGebra: [color=#999999][url=https://www.geogebra.org/u/rafael]Rafael Losada[/url][/color][/color]