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なぜ五角形と六角形なの？サッカーボールが丸くなる秘密を数学で証明します。【ワールドカップの歴史】
【楽しい授業動画】あきとんとん
· AUG 10, 2026
This YouTube video has 29 000 views and was published Aug 10, 2026 on 【楽しい授業動画】あきとんとん. That is 1.7x the channel's average views.
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【楽しい授業動画】あきとんとん
