take some brooms

Auteur:
chris cambré

equivalence principles

How to start with solving sets of equations? What are equivalence principles? Brooms can solve the problem... Because isn't the crossing of two brooms a different thing than the solution of a set of equations? And if I hold a third broom so that it goes through the same point I might is well remove one of the first two.
  • Why should I take a third broom?
  • How shoulf I hold it to define more easily the crossing point?
Image

Or years later, in a GeoGebra-applet

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