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...her or mother of a field|father]] of trigonometry".{{sfnp|Boyer|1991 |loc="Greek Trigonometry and Mensuration" |p=[https://archive.org/details/historyofmath ...similar method.<ref>{{cite book|author=Otto Neugebauer |title=A history of ancient mathematical astronomy. 1 |url=https://books.google.com/books?id=vO5FCVIxz2 ...

== Ancient Egypt == ...l is being spent. This practice has existed in some form for centuries; in ancient [[Egypt]], for example, when grain was often used as currency, local granar ...

...to the spice islands of the East: this he justifies on his studies of the ancient texts detailed in [[#legend3|Legend 3]] for as yet these were unexplored re ...on of countries and their shapes; (3) to stay true to the understanding of ancient writers. ...