Tamanho da Terra - II

Synopsis: In this program, Ptolemy, Columbus Eratosthenes and discuss one of the greatest achievements of ancient science and a testament to the power of mathematics and human ingenuity. The Eratosthenes himself armed with the information of an ancient papyrus and basic trigonometry, calculated for the first time, with great precision, the circumference of the Earth, around 200 BC (Part 2/2)
Source: Unicamp - M3, Mathematics Multimedia.
URL: http://m3.ime.unicamp.br/recursos/1322