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Leonardo da Vinci drew the illustrations for Luca Pacioli's 1509 book De Divina Proportione (The Divine Proportion). Drawing of the Duodecedron Abscisus Elevatus Vacuus, consisting of 120 equilateral triangles, from the manuscript of the book.

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Painting of the Renaissance geometer, Fra Luca Pacioli, by Jacopo de Barbari, 1495, Capodimonte Museum, Naples.(Detail)

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The Ducal Star, a glass lampshade based on a mathematical design that dates back to the 1400s, is a symbol of Urbino’s Renaissance. The shape of this star is considered mathematically perfect and was first described in De Divina Proportione (About the Divine Proportions), a book by mathematician Luca Pacioli, illustrated by Leonardo da Vinci, which dates to around 1497. Made of blown glass and brass, the lamp adorned the noble homes of Urbino.

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Tetraedro disegnato da Leonardo da Vinci per illustrare l'opera De Divina Proportione di Luca Pacioli (1503)

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De Divina Proportione - a book on mathematics written by Luca Pacioli and illustrated by Leonardo da Vinci, composed around 1498 in Milan and first printed in 1509

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Leonardo da Vinci drew the illustrations for Luca Pacioli's 1509 book De Divina Proportione (The Divine Proportion). Drawing of the truncated icosahedron, from the manuscript of the book.

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Leonardo Da Vinci illustrated Luca Pacioli’s “De Divina...

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Cinco razones para considerar divina la el número áureo, cortesía de Luca Pacioli - http://cerebrodigital.org/2013/01/cinco-razones-para-considerar-divina-la-el-numero-aureo-cortesia-de-luca-pacioli/ : A todos nosotros nos suena el número Pi. Incluso somos capaces de enumerar alguno de sus decimales de memoria. Sin embargo, mucho menos conocido en el número Phi: 1,6180339887. El también llamado número divino o proporción áurea. Es el número que define y determina la

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Leonardo da Vinci's drawing of the stellated octahedron or stella octangula (octocedron elevatus solidus) for Luca Pacioli's book 'De divina proportione'.

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Leonardo da Vinci's Geometric Sketches - Icosahedron | Mathematical Association of America

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