From c9a89f5fc4f6150d382bd60d37145f0569db1433 Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Sun, 6 Sep 2020 11:02:57 +0200
Subject: [PATCH] Update cheatsheet.en.md

---
 .../02.plane-refracting-surface-overview/cheatsheet.en.md    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/02.plane-refracting-surface-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/02.plane-refracting-surface-overview/cheatsheet.en.md
index f8ed12787..492c5b18d 100644
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/02.plane-refracting-surface-overview/cheatsheet.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/02.plane-refracting-surface-overview/cheatsheet.en.md
@@ -80,7 +80,9 @@ refracting interface corresponds to two different plane refracting surfaces :<br
 #### Non stigmatism of spherical refracting surfaces
 
 Ray tracing study of a **spherical refracting surface** :
+<!--à supprimer
 [Click here for geogebra animation](https://www.geogebra.org/material/iframe/id/x4hxqekd)<br>
+-->
 
 * **At each impact point** of the rays upon the spherical refracting surface, the **Snell-Descartes relation applies**.
 
@@ -222,8 +224,9 @@ in Figures 3 and 4, and 5 and 6 below, and review NOTE 1.
 !!!! also to check that you master the analytical study of each presented case.
 !!!!
 
-
+<!--a supprimer
 [Click here for geogebra animation](https://www.geogebra.org/material/iframe/id/gvkqgrpe)<br>
+-->
 
 * with **real objects**