{"version":"1.0","provider_name":"Matem\u00e1ticas y sus fronteras","provider_url":"https:\/\/www.madrimasd.org\/blogs\/matematicas","author_name":"Matem\u00e1ticas y sus fronteras","author_url":"https:\/\/www.madrimasd.org\/blogs\/matematicas\/author\/matematicas","title":"Demostraci\u00f3n de que la Tierra es esf\u00e9rica y m\u00e9todos deductivos variados en 4\u00ba ESO + Empresa - Matem\u00e1ticas y sus fronteras","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"JLljedDris\"><a href=\"https:\/\/www.madrimasd.org\/blogs\/matematicas\/2015\/03\/25\/139430\">Demostraci\u00f3n de que la Tierra es esf\u00e9rica y m\u00e9todos deductivos variados en 4\u00ba ESO + Empresa<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.madrimasd.org\/blogs\/matematicas\/2015\/03\/25\/139430\/embed#?secret=JLljedDris\" width=\"600\" height=\"338\" title=\"\u00abDemostraci\u00f3n de que la Tierra es esf\u00e9rica y m\u00e9todos deductivos variados en 4\u00ba ESO + Empresa\u00bb \u2014 Matem\u00e1ticas y sus fronteras\" data-secret=\"JLljedDris\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/**\n * WordPress inline HTML embed\n *\n * @since 4.4.0\n * @output wp-includes\/js\/wp-embed.js\n *\n * This file cannot have ampersands in it. 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Hoy, 25 de marzo, empieza la tercera y \u00faltima jornada, pero antes, recordamos el d\u00eda de ayer. Erat\u00f3stenes prob\u00f3, en el siglo III a. C., que la longitud de la Tierra era aproximadamente 39.000 km (seg\u00fan el valor que estimemos del\u2026","thumbnail_url":"http:\/\/www.madrimasd.org\/blogs\/matematicas\/files\/2015\/03\/IMG_5327-300x200.jpg"}