Practica geometriae

work by Fibonacci

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July 1, 2026

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The Practica geometriae is a work by the medieval Italian mathematician Fibonacci, written around 1220. It is a collection of eight chapters containing theorems based on Euclid's Elements and On Divisions. This work demonstrates Fibonacci's engagement with geometry, building upon the foundations laid by ancient Greek mathematicians. While Fibonacci is more widely known for his Liber abaci, which introduced Hindu-Arabic numerals to Europe, and the Fibonacci sequence, the Practica geometriae showcases his contributions to the practical application and theoretical understanding of geometry during his time.12345

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Fibonacci
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…produced a brief work, the Practica geometriae (“Practice of Geometry”), which included eight chapters of theorems based on Euclid’s Elements and On Divisions.
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…produced a brief work, the Practica geometriae (“Practice of Geometry”), which included eight chapters of theorems based on Euclid’s Elements and On Divisions.
Read More