Update annex.fr.md

12.temporary_ins/06.geometry-coordinates/10.n1/30.beyond/annex.fr.md

@@ -21,5 +21,54 @@ lessons:
 
 ---------------------------------------------
 
+##### Quelques exemples
+
+! *YOUR  CHALLENGE*  :  Montrer que la somme des angles dans un quadrilatère égale 360°
+! _Skill tested : understanding of physical situations_
+!
+! ![](geometry-euclidian-quadrilateral-360_0_L1200.jpg)
+!
+! *Discovery time : ... minutes*<br>
+! *Resolution time : ... minutes*
+!
+! <details markdown=1>
+! <summary>
+! I choose it
+! </summary>
+! Il faut faire xxx
+! <\details>
+! <details markdown=1>
+! <summary>
+! step 1
+! </summary>
+! blablabla
+! <details markdown=1>
+! <summary>
+! xxx1
+! </summary>
+! yyy1
+! </details>
+! <details markdown=1>
+! <summary>
+! xxx2
+! </summary>
+! yyy2
+! </details>
+! <details markdown=1>
+! <summary>
+! xxx3
+! </summary>
+! yyy3
+! </details>
+! <details markdown=1>
+! <summary>
+! xxx4
+! </summary>
+! yyy4
+! </details>
+! </details>
+
+
+