{"id":1305,"date":"2020-01-08T14:00:00","date_gmt":"2020-01-08T13:00:00","guid":{"rendered":"http:\/\/samuserensemble.fr\/?p=1305"},"modified":"2021-06-19T00:27:50","modified_gmt":"2021-06-18T22:27:50","slug":"lorigami-spontane","status":"publish","type":"post","link":"http:\/\/samuserensemble.fr\/?p=1305","title":{"rendered":"L&rsquo;origami spontan\u00e9 : pliages math\u00e9matiques"},"content":{"rendered":"\n<p>Nous avons regard\u00e9, il y a quelque temps, le documentaire&nbsp;<em>Un monde en plis, Le code origami<\/em>. C&rsquo;est une mani\u00e8re agr\u00e9able de s&rsquo;int\u00e9resser aux math\u00e9matiques via l&rsquo;origami. Nous y avons vu comment cet art du pliage du papier est enseign\u00e9 d\u00e8s le premier \u00e2ge aux enfants et \u00e0 quel point certains artistes sont dou\u00e9s.<\/p>\n\n\n\n<p>L&rsquo;une des personnes mentionn\u00e9es dans le documentaire, Biruta Kresling, a d\u00e9velopp\u00e9 ce qu&rsquo;elle appelle de l&rsquo;origami instantan\u00e9. Il s&rsquo;agit de cr\u00e9er un origami complexe en&#8230; moins d&rsquo;une seconde ! Notre curiosit\u00e9 a \u00e9t\u00e9 piqu\u00e9e par sa d\u00e9monstration et nous avons voulu faire des essais de notre c\u00f4t\u00e9.<\/p>\n\n\n\n<p>Le premier mod\u00e8le qu&rsquo;on la voit cr\u00e9er dans le documentaire, c&rsquo;est un simple c\u00f4ne en papier, d\u00e9coup\u00e9 dans une page et \u00e9cras\u00e9 par une pile de livres.&nbsp;Le second mod\u00e8le de la designer se fait en enroulant une feuille sur deux tubes de carton et en tournant le papier pour le compresser.<\/p>\n\n\n\n<p>Nous avons eu envie de mettre cela en pratique, parce que c&rsquo;\u00e9tait fascinant \u00e0 voir. Bien s\u00fbr, nous n&rsquo;avions aucune indication pr\u00e9cise et nos t\u00e2tonnements n&rsquo;ont pas \u00e9t\u00e9 aussi beaux que les r\u00e9sultats de Biruta Kresling, mais cela nous a permis de comprendre en testant malgr\u00e9 tout.<\/p>\n\n\n\n<p>Pour le premier mod\u00e8le, nous avons d\u00e9coup\u00e9 un cercle, trac\u00e9 et d\u00e9coup\u00e9 son rayon et transform\u00e9 le papier en c\u00f4ne. Nous avons ensuite l\u00e2ch\u00e9 une pile de livres sur le papier. Le c\u00f4ne s&rsquo;est pli\u00e9 sous le poids. Ce pliage est moins fin et r\u00e9gulier que dans le film, mais nous y avons tout de m\u00eame retrouv\u00e9 la forme de spirale annonc\u00e9e.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-1024x768.jpg\" alt=\"Origami spontan\u00e9, papier\" class=\"wp-image-6660\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-1-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-1024x768.jpg\" alt=\"Origami spontan\u00e9, c\u00f4ne\" class=\"wp-image-6661\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-2-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-1024x768.jpg\" alt=\"Origami spontan\u00e9, \u00e9cras\u00e9 recto\" class=\"wp-image-6664\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-4-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-1024x768.jpg\" alt=\"Origami spontan\u00e9, \u00e9cras\u00e9 verso\" class=\"wp-image-6665\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-5-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Pour le second mod\u00e8le, nous avons utilis\u00e9 une feuille de papier coll\u00e9e sur deux tubes de papier toilette et nous avons tourn\u00e9 chaque tube en sens contraire. L\u00e0 encore, si notre r\u00e9sultat est moins abouti, on voit malgr\u00e9 tout que le papier ne se plie pas n&rsquo;importe comment.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-1024x768.jpg\" alt=\"\" class=\"wp-image-6667\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-6-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-1024x768.jpg\" alt=\"\" class=\"wp-image-6668\" srcset=\"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-1024x768.jpg 1024w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-300x225.jpg 300w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-768x576.jpg 768w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-1536x1152.jpg 1536w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-2048x1536.jpg 2048w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-450x338.jpg 450w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-850x638.jpg 850w, http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Origami-spontane-7-667x500.jpg 667w\" sizes=\"(max-width: 739px) 94vw, (max-width: 969px) 88vw, (max-width: 1199px) 860px, 850px\" \/><\/figure>\n\n\n\n<p>Nous sommes preneurs d&rsquo;autres id\u00e9es d&rsquo;origami spontan\u00e9, si vous en connaissez !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous avons regard\u00e9, il y a quelque temps, le documentaire&nbsp;Un monde en plis, Le code origami. C&rsquo;est une [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6641,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[699],"tags":[93,413,482,660],"class_list":["post-1305","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apprendre-en-samusant","tag-bricolage","tag-mathematiques","tag-origami","tag-video"],"aioseo_notices":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"http:\/\/samuserensemble.fr\/wp-content\/uploads\/2021\/06\/Un-monde-en-plis-affiche.jpg","_links":{"self":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/1305","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1305"}],"version-history":[{"count":2,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/1305\/revisions"}],"predecessor-version":[{"id":6671,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/posts\/1305\/revisions\/6671"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=\/wp\/v2\/media\/6641"}],"wp:attachment":[{"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1305"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/samuserensemble.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}