Feat(6e): Production des documents dessins géométrique

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\documentclass[a4paper,12pt]{article}
\usepackage{myXsim}
\author{}
\date{Novembre 2018}
\title{Reproduction avec un croquis}
\tribe{Sixième}
\pagestyle{empty}
\begin{document}
\begin{exercise}[subtitle={Croquis de Ahmed}]
Ahmed à fait un dessin de géométrie.
Pour expliquer à Pierre comment il a fait, Ahmed fait un croquis.
\includegraphics[scale=0.2]{./fig/croquis_ahmed}
Pierre peut-il reproduire le dessin de Ahmed?
\end{exercise}
\printexercise{exercise}{1}
\printexercise{exercise}{1}
\end{document}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "master"
%%% End:

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Géométrie dessinées avec les 6e du collège de Mouthe, novembre 2018
###################################################################
:date: 2018-11-07
:modified: 2018-11-07
:tags: Geométrie
:category: 6e
:authors: Bertrand Benjamin
:summary: Reproduction, analyse et codage de figures avec les 6e de Mouthe en 2018
Étape 1: reproduction
=====================
Reproduction de `deux rectangles l'un dans l'autre <./E1_act_reproduction.pdf>`_. Les dessins risquent d'être imprécis au départ. Il va falloir se demander ce que signifie *reproduire* et commencer à analyser la figure. Si les élèves ont des difficultés à nommer les éléments, on peut leur proposer de nommer les sommets des rectangles.
Il est préférable de de vérifier la validité de la reproduction en utilisant les outils de géométrie, cela va permettre de rappeler leurs utilités.
Cahier de bord: on colle `l'analyse de la figure <./B1_act_repoduction.pdf>`_ ainsi que la liste de tous les éléments remarquables trouvés.
On demande de refaire un dessin le plus précis possible à la maison.
Étape 2: reproduction
=====================
`Deuxième activité de reproduction <./E2_act_reproduction.pdf>`_. Le but est que les élèves analysent eux même la figure avant de la reproduire.
Pour aider les élèves les plus en difficultés, on pourra faire passer au tableau les élèves qui ont déjà faire une analyse avant qu'ils ne se lancent la reproduction.
Pour les plus rapide, on peut leur proposer `une reproduction agrandie <./E2_agrandissement.pdf>`_.
Étape 3: dessin à partir d'un croquis
=====================================
Cette fois ci on part `d'un croquis <./E3_croquis.pdf>`_. On se demande si c'est possible de reproduire le dessin qui est représenté par le croquis.
Quand il a été mis en évidence qu'il manquait une information à propos du quadrilatère CAFE, on peut leur dire que c'est un carré. Les élèves peuvent alors se lancer dans la reproduction.
Il serait intéressant que l'alignement des points A, D et E soit évoqué pour pouvoir préciser la différence entre un dessin et un croquis.
Cahier de bord: On explique la différence entre croquis et dessin géométrique.
Étape 4: Échange de croquis
===========================
La classe est séparé en deux. Chaque groupe reçoit `un dessin géométrique <./E4_transmission.pdf>`_. Il doit l'analyser puis faire un croquis.
Ensuite on échange les croquis et les élèves doivent analyser le croquis et indiquer les informations qui leur manquent pour pouvoir réaliser le dessin.
Un nouvel échange est fait. Chaque élève précise son croquis en fonction des questions qui lui ont été posées.
Enfin, on échange à nouveau les croquis et chaque élève doit faire le dessin géométrique qui correspond au croquis.