{"version":"1.0","provider_name":"MATH&#039;MONDE, le blog d&#039;Herv\u00e9 LEHNING, agr\u00e9g\u00e9 de math\u00e9matiques ","provider_url":"https:\/\/blogs.futura-sciences.com\/lehning","author_name":"MATH&#039;MONDE, le blog d&#039;Herv\u00e9 LEHNING, agr\u00e9g\u00e9 de math\u00e9matiques ","author_url":"https:\/\/blogs.futura-sciences.com\/lehning","title":"Une sangaku c\u00e9l\u00e8bre, de Hidetoshi Fukagawa, par Herv\u00e9 Lehning","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"HrtmsQKZyX\"><a href=\"https:\/\/blogs.futura-sciences.com\/lehning\/2018\/06\/09\/sangaku-celebre-de-hidetoshi-fukagawa\/\">Une sangaku c\u00e9l\u00e8bre, de Hidetoshi Fukagawa<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/blogs.futura-sciences.com\/lehning\/2018\/06\/09\/sangaku-celebre-de-hidetoshi-fukagawa\/embed\/#?secret=HrtmsQKZyX\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Une sangaku c\u00e9l\u00e8bre, de Hidetoshi Fukagawa\u00a0\u00bb &#8212; MATH&#039;MONDE, le blog d&#039;Herv\u00e9 LEHNING, agr\u00e9g\u00e9 de math\u00e9matiques \" data-secret=\"HrtmsQKZyX\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","thumbnail_url":"https:\/\/blogs.futura-sciences.com\/lehning\/wp-content\/uploads\/sites\/13\/2018\/06\/VisuCom7.png","thumbnail_width":1181,"thumbnail_height":1181,"description":"Les sangakus japonaises sont de petits chefs d\u2019\u0153uvres aussi bien au niveau du raisonnement math\u00e9matique que de l\u2019esth\u00e9tique. Jean Constant, par exemple, s\u2019en est fait une sp\u00e9cialit\u00e9 (voir l\u2019image mise en avant). La sangaku suivante a \u00e9t\u00e9 d\u00e9couverte par Hidetoshi Fukagawa. Les deux triangles (rouge et vert) inscrits dans le carr\u00e9 jaune sont \u00e9quilat\u00e9raux, quel &hellip; Continuer la lecture de  &rarr;"}