Changes

* Digital : Computer, geogebra application, projector.

* Digital : Computer, geogebra application, projector.

* Non digital : Worksheet and pencil, compass, strings

* Non digital : Worksheet and pencil, compass, strings

* Geogebra files :  [https://ggbm.at/hkqkamre Introduction to chords.ggb]

* Geogebra files :  [https://ggbm.at/caezkayv Introduction to chords.ggb]

{{Geogebra|hkqkamre}}

{{Geogebra|caezkayv}}

===Process (How to do the activity)===

===Process (How to do the activity)===