A Micro-experiment aimed at students developing the ability to recogine the symmetry axes in natural entities, symbols or patterns. Students use their intuition to position on the symmetry axis of each shape a line that can be changed dynamically and dynamically check if their actions have led to the correct result. This Micro-experiment was created using Dynamic Geometry Software (D.G.S.) and Computer Algebra Systems (C.A.S.) (Geogebra).