Date: | 1913 |
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Description: | A group of nine men are gathered in a room, possibly a classroom. Seven of the men are standing at a makeshift table on sawhorses on the edges of the room... |
Date: | 11 24 1965 |
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Description: | University of Wisconsin Mathematics Professor Donald W. Crowe explaining a math problem on how to cut up a rectangular cake into equal size acute triangles... |
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