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Engraved plate showing a flattened net of a pentagonal pyramid frustum, with two shaded pentagonal bases and trapezoid faces.

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The Frustum of a Pentagonal Pyramid, John Lodge Cowley (1765). Via artnap.com

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Why is this public domain? John Lodge Cowley died in 1797; this work is in the public domain.

About this work

An engraved geometric plate titled The Frustum of a Pentagonal Pyramid, labeled Plate 29 and Book 5, shows a flattened net of a truncated pentagonal pyramid. Two shaded pentagons of different sizes are linked by trapezoidal faces, with fine concentric hatching filling the bases. The print is attributed to John Lodge Cowley and dated 1765.