[color=#999999][color=#999999]This activity belongs to the [i]GeoGebra book[/i] [url=https://www.geogebra.org/m/dm9prd7h]Attractive projects.[/url][/color][/color][b][br][br]2D project[/b]: [i]create automatic dynamic demonstrations.[/i][br][br]If we generalize the Fermat point to more vertices, we obtain the Steiner tree (adding the Steiner points that are necessary).[br][br]Observe that the [b]robots do not know where the points A, B, C and D are[/b], it is enough that they know at what distance they are at each moment.

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