http://www.malinc.se/math/trigonometry/eratosthenesen.php WebEratosthenes (276 BC-194 BC) was a Greek mathematician, geographer and astronomer. He was born in Cyrene (now Libya) and died in Ptolemaic Alexandria. He is noted for devising a map system based on latitude and …
How Eratosthenes measured the radius of Earth
WebMath. Advanced Math. Advanced Math questions and answers. When he measured the shadow cast by an object in Alexandria, Eratosthenes foundthat the shadow was about 7.92 times the length of the stick he used. Draw the triangle formed bythe stick and the shadow, and use trigonometry to find the angle of the shadow; this is equivalent tothe … Eratosthenes of Cyrene was a Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria. His work is comparable to what is now known as the study of geography, and he introduced some of the terminology still used today. john crum american national insurance
Ptolemy’s Contribution in Mathematics – StudiousGuy
WebEratosthenes analyzed the observations with the assumption that the earth is a sphere and the sun is very far away. The geometry of the situation is sketched at the right. ... A little trigonometry shows that. Using the values 50 degrees and 60 degrees as measured on the trip, with b=1000 miles, we find that h is approximately 2000 miles. This ... WebA man of many talents, Eratosthenes was a librarian, geographer, mathematician, astronomer, historian, and poet. His friends at the library nicknamed him Pentathlos, or athlete who competes in five different events. The name seemed to fit a scholar who … WebAug 2, 2024 · The famous Eratosthenes experiment, that can be found at famousscientists website, relied on the fact known to Thales and others that a beam of parallels cut by a transverse straight line determines equal measure for the corresponding angles. ... Your observation is correct, that plane trigonometry depends on understanding of similar … intended graduate major