This interactive mathlet is an adaptation of the drawing that Leonardo da Vinci made of the cuboctahedron (exacedron abscisus vacuus) for Luca Pacioli's book 'De Divina Proportione'.
Pacioli wrote about the cuboctahedron (Spanish translation):
"El hexaedro despuntado o absciso plano, igualmente sólido o hueco, tiene veinticuatro líneas que originan en él cuarenta y ocho
ángulos superficiales, veinticuatro de los cuales son rectos y los demás agudos; tiene doce ángulos sólidos y está contenido por
catorce superficies o bases, seis de las cuales son cuadradas y ocho triangulares. Todas las mencionadas líneas son comunes a las
bases cuadradas y a las triangulares, porque las seis cuadradas unidas entre sí angularmente forman, necesariamente, ocho triángulos,
como hacían los hexágonos en el tetraedro absciso. Y este cuerpo se origina del cubo mediante el corte uniforme en la mitad de sus
lados, como demuestra de modo evidente su propia forma material."
('La divina proporción' de Luca Pacioli, page 91, Spanish translation by Juan Calatrava, Editorial Akal, 4th edition, 2008)
Leonardo da Vinci's drawing of the cuboctahedron (exacedron abscisus vacuus) for Luca Pacioli's book 'De divina proportione'. (There is an Spanish version, 'La divina proporción' Editorial Akal. Image used with permission of Editorial Akal).
Leonardo da Vinci's drawing of the cuboctahedron (exacedron abscisus solidus) for Luca Pacioli's book 'De divina proportione'. (There is an Spanish version, 'La divina proporción' Editorial Akal. Image used with permission of Editorial Akal).
REFERENCES
Luca Pacioli - La divina proporción - Ediciones Akal, 4th edition, 2004. Spanish edition of 'De divina proportione'. Translation by Juan Calatrava.
Leonardo da Vinci's Geometric Sketches artículo de Frank J. Swetz en MathDl, Loci:Convergence.
Leonardo da Vinci's Polyhedra página de George Hart en su excelente sitio sobre poliedros.
LINKS
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Leonardo da Vinci: Drawing of a truncated octahedron made to Luca Pacioli's De divina proportione.
Leonardo da Vinci made several drawings of polyhedra for Luca Pacioli's book 'De divina proportione'. Here we can see an adaptation of the truncated octahedron.
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Leonardo da Vinci: Drawing of a dodecahedron made to Luca Pacioli's De divina proportione.
Leonardo da Vinci made several drawings of polyhedra for Luca Pacioli's book 'De divina proportione'. Here we can see an adaptation of the dodecahedron.
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Leonardo da Vinci:Drawing of an stellated octahedron (stella octangula) made to Luca Pacioli's De divina proportione.
Leonardo da Vinci made several drawings of polyhedra for Luca Pacioli's book 'De divina proportione'. Here we can see an adaptation of the stellated octahedron (stella octangula).
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The volume of a cuboctahedron
A cuboctahedron is an Archimedean solid. It can be seen as made by cutting off the corners of a cube.
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The volume of a cuboctahedron (II)
A cuboctahedron is an Archimedean solid. It can be seen as made by cutting off the corners of an octahedron.
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Stellated cuboctahedron
The compound polyhedron of a cube and an octahedron is an stellated cuboctahedron.It is the same to say that the cuboctahedron is the solid common to the cube and the octahedron in this polyhedron.
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