Interoperable interactive geometry for Europe
I forgot my login data

Report a bug

Fan club

Quick Intro Videos
click to start movie
Create A Simple
GeoGebra Resource (25Mb)
click to start movie
Filing a review
click to start movie
Find a Resource

This platform is brought to you by the intergeo project, funded under the eContent Plus programme of the European commission and by partners

Review for "Somme des angles d'un triangle"

Alterne interne

Global comment:

Review filed on 2012/09/26 13:50 by jonathan.

L'activité est intéressante, elle nous fait la preuve que la somme des angles intérieurs d'un triangle est de 180 degrés par la propriété des angles alternes internes. Il est alors possible de voir se déplacer les angles le long des côtés du triangle pour finalement former un angle de 180 degrés avec l'angle supérieur.
This review is done without a trial in classroom.

Usage conditions

Hardware setup

Learner organization

More about the context of usage (free comments):

Update the selected educational level(s) for this resource.

Educational levels:

Radio buttons: more on the left side to say that I don't agree, more on the right side to say that I agree