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

Somme des angles d'un triangle 2

Un triangle, et une droite parallèle à un côté et passant par le sommet opposé. (Pour donner l'idée d'une démonstration de la propriété sur la somme des angles.)

This Resource is Copied from a First-Steps Trace

Coming from trace Somme des angles d un triangle (geolabo) 2? which mentioned 1 constructions.

  • Geometry system: Geolabo.
  • Country: fr
  • Educational level: 5e
  • Main topic: Triangles
  • Other themesangles, symétrie centrale

Preview of the Resource in Action