- Inventive
- Religious
- Methodical
- Unusual
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- He was a Friar, Mathematician, and Writer.
- He wrote an unpublished treatice on chess.
- He had collaborated with Leonardo da Vinci.
- Made a woodcut of the porportions of the human face.
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- He was born in 1447, at Sansepolcro, Republic of Florence.
- He lived with the Befolci family.
- He recieved an abbaco education. (calculation education)
- He moved to Venice.
- He wrote the books, Summa de Arithmetica, and De Divina Proportione.
- He invented Double-Entry Bookkeeping (Accounting).
- He fled Milan when Louis XII of France siezed the city and drove out his patron.
- He died in 1517, at Sansepolcro, Republic of Florence.
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