What did Gerbert of Aurillac write about geometry?

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Sylvester II Sylvester II, detail from the ivory vessel used at the consecration of Otto III, 996; in the Domschatzkammer des Aachener Domes, Aachen, Ger.

Gerbert of Aurillac, who later became Pope Sylvester II, prepared a work on geometry that sought to address the limitations caused by the existence of only fragmentary versions of Euclid’s writings at the time. His treatise incorporated various texts authored by Roman surveyors to provide a more comprehensive resource for the subject.1

During this period, geometry in the West was primarily focused on approximate formulas for measuring volumes and areas, following the traditions established by Roman surveyors. In addition to his work on geometry, Gerbert was renowned for his scholarly contributions to the quadrivium, including his influential writing on the abacus, which introduced the use of Hindu-Arabic numerals to medieval scholars.21