• Stars, snowflakes, a windmill , ... these are objects from real life. The geometry they have in common are linear functions. 

​​           Look at the GeoGebra book with nearly 20 real life objects  created by Italian students.
 

• Citron squeezer, donats .... these are all objects from real life. The geometry of all these objects hasto do with transformations. 

          The GeoGebra applet shows a model of a citrus squeezer created by Riccardo Manaila from the Italien school.

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GeoGebra book with more everyday objects (IT)