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diff --git a/3e/Geometrie/Transformations/index.rst b/3e/Geometrie/Transformations/index.rst
index 03736bd..e80ef9b 100644
--- a/3e/Geometrie/Transformations/index.rst
+++ b/3e/Geometrie/Transformations/index.rst
@@ -2,7 +2,7 @@ Transformations de figures avec les 3e pour l'année 2017-2018
 #############################################################
 
 :date: 2017-11-13
-:modified: 2017-11-13
+:modified: 2017-11-20
 :tags: Geometrie, Thales, Agrandissement, Symétries
 :category: 3e
 :authors: Bertrand Benjamin
@@ -16,8 +16,10 @@ Classement des transformations et caractérisations des éléments importants à
 Étape 2
 --------
 
-Que conserve chaque transformations?
+Travail de groupe sur comment `réaliser une homothétie <./construction_homothetie.pdf>`_
+
 
 Étape 3
 --------
 
+Que conserve chaque transformations?