Changes

*Digital : Computer, geogebra application, projector.

*Digital : Computer, geogebra application, projector.

*Non digital : Worksheet and pencil

*Non digital : Worksheet and pencil

*Geogebra files :  '''“[https://www.geogebra.org/m/prvUJHb5 Introduction to a triangle.ggb]”'''

*Geogebra files :  '''“[https://www.geogebra.org/m/xt5tcf6t Introduction to a triangle.ggb]”'''

{{Geogebra|xt5tcf6t}}

{{Geogebra|xt5tcf6t}}