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video thumbnail 6:13
Squares & Triangles (EXTRA FOOTAGE #1)

2014-09-19

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uploader channel thumbnailNumberphile2
video thumbnail 4:06
Squares & Triangles (EXTRA FOOTAGE #2)

2014-09-19

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uploader channel thumbnailNumberphile2
video thumbnail 15:08
Triangle Centres and the Euler Line (extra footage)

2016-02-02

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uploader channel thumbnailNumberphile2