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# Objectif 7 : Aires de figures usuelles (Grandeurs et Mesures - 6e) > [name=Beatrice Battesti,Collège de Casinca] <div class="row"> <div class="col-md-6"> :::success :pushpin: [Automatismes](https://coopmaths.fr/alea/?uuid=6225c&id=6M23&n=4&d=10&s=6&s2=false&s3=1&s4=false&cd=1&cols=2&uuid=eb45a&id=6M11&uuid=ac571&id=6M22&n=2&d=10&s=4-5&s2=true&s3=true&s4=false&cd=1&cols=2&v=eleve&es=021100&title=) :books: [Un cours](https://nuage03.apps.education.fr/index.php/s/8T539HkEBQCP4fy) :page_facing_up: [Une fiche d'exercices](https://nuage03.apps.education.fr/index.php/s/8cqETiJeEB34Hng) ::: *** :::info ### Activité <p><iframe height="150px" src="https://www.geogebra.org/material/iframe/id/j9nej7ew/width/1442/height/710/border/888888/sfsb/true/smb/false/stb/false/stbh/false/ai/false/asb/false/sri/true/rc/false/ld/false/sdz/true/ctl/false" style="border:0px;" title="Aire du disque" width="100%"></iframe></p> ::: </div> <div class="col-md-6"> ::: danger ### Vidéos #### Le nombre pi <p><iframe allowfullscreen="" frameborder="0" height="215" src="https://www.youtube.com/embed/B9NMxapgHtg?wmode=transparent" title="YouTube video player" width="100%"></iframe></p> #### Aire du disque <p style="text-align:center;"><iframe allowfullscreen="" frameborder="0" height="215" src="https://www.youtube.com/embed/y-PV5LNmqsM?wmode=transparent" title="YouTube video player" width="100%"></iframe></p> ::: </div></div> :::warning ### S'exercer <iframe src="https://learningapps.org/watch?app=13088493" style="border:0px;width:100%;height:500px" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"></iframe>