Update cheatsheet.en.md

6 years ago · f31f3ebeef
1 changed files with 2 additions and 0 deletions
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/02.new-course-overview/cheatsheet.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/02.new-course-overview/cheatsheet.en.md
@ -146,6 +146,8 @@ side* of the mirror.<br><br>

 ##### Examples of graphical situations, with analytical results to train

+![Click here for geogebra animation](https://www.geogebra.org/m/jwgy9q7z)
+
 * with **real objects** 

 ![](Thin-spherical-mirror-InfAC-1000.jpg)