WebBorn: 276 BC in Cyrene (modern day Libya) Died: 194 BC (at age 82) in Alexandria, Egypt Nationality: Greek Famous For: Calculating the Earth’s circumference Eratosthenes was a mathematician and astronomer from … WebApr 2, 2024 · See all related content → Eratosthenes, in full Eratosthenes of Cyrene, (born c. 276 bce, Cyrene, Libya—died c. 194 bce, Alexandria, …
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WebBorn: 276 BC Born In: Cyrene, Libya, Shahat, Libya 90 21 Mathematicians #23 Astronomers #10 Geographers #1 Quick Facts Also Known As: Eratosthenes of Cyrene Died At Age: 82 Family: father: Aglaus Born … WebN oting that the sun was directly overhead at noon in Syene (modern day Aswan) on the summer solstice, Eratosthenes measured the shadow cast by a vertical stick in Alexandria at noon that same day. Assuming that the sun's rays at the two locations are parallel and given the distance between Syene and Aswan, simple geometry involving similarity led to … proeye group omaha
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About 2,250 years ago, there was a man called Eratosthenes. He was one of those ancient Greeks who changed the world. He was a polymath, someone with expert knowledge of a range of topics. A mathematician, geographer, astronomer, philosopher, poet, and music theorist. He's famous for being the … See more His little experiment demonstrated that the surface of the earth was curved like a sphere. Why? Because his pole in Alexandria was … See more Let's go. Assume the earth is a perfect sphere (it's not, but it's not a problem for these calculations). We know there are 360 degrees in a circle. If you cut the earth in half, the earth's great circle will obviously have 360 … See more And that left him with one final measurement. To figure out the circumference of the earth, he needed to somehow measure the distance between Alexandria and Syene. So he asked someone (or a team … See more He was incredibly close. As it turns out, the meridional circumference of Earth (from pole to pole) is roughly 40,008 km, and the equatorial circumference is about 40,075 km (it's bigger at the equator because Earth … See more WebJun 8, 2024 · Eratosthenes ( b. Cyrene [now Shahhat, Libya], ca. 276 b.c.; d. Alexandia, ca. 195 b.c.) geography, mathematics. Eratosthenes, son of Aglaos, was born in Cyrene but spent most of his working life in Alexandria, where he was head of the library attached to the famous Museum from ca. 235 until his death. 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 … pro-ex wrestling