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A 3D perspective drawing of a cube. Above the top surface of the cube, the Greek letters Ω and Γ are written. To the right of the cube, there are several decorative flourishes and calligraphic marks.
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5
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...? construction ...?
...? 12, 13 ...?
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...? Δ ...?
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...? the ...?
A geometric diagram of a right-angled triangle or a construction showing a perpendicular line meeting a horizontal baseline. To the right of the diagram is a faint, circular institutional library stamp.