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Два разных замощения плоскости (спиралевидное и кольцеобразное) копиями многоугольника, изображенного сверху, из книги Грюнбаума и Шепарда "Замощения и орнаменты"



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Два разных замощения плоскости (спиралевидное и кольцеобразное) копиями многоугольника, изображенного сверху, из книги Грюнбаума и Шепарда "Замощения и орнаменты"

BY Геометрия-канал




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Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. WhatsApp, a rival messaging platform, introduced some measures to counter disinformation when Covid-19 was first sweeping the world. Official government accounts have also spread fake fact checks. An official Twitter account for the Russia diplomatic mission in Geneva shared a fake debunking video claiming without evidence that "Western and Ukrainian media are creating thousands of fake news on Russia every day." The video, which has amassed almost 30,000 views, offered a "how-to" spot misinformation. Russian President Vladimir Putin launched Russia's invasion of Ukraine in the early-morning hours of February 24, targeting several key cities with military strikes. Telegram Messenger Blocks Navalny Bot During Russian Election
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