# Where Is Eratosthenes?

## Who is the father of mathematics?

ArchimedesArchimedes is known as the Father Of Mathematics.

He lived between 287 BC – 212 BC.

Syracuse, the Greek island of Sicily was his birthplace..

## How did Eratosthenes change the world?

Eratosthenes may have been the first to use the word geography. He invented a system of longitude and latitude and made a map of the known world. He also designed a system for finding prime numbers — whole numbers that can only be divided by themselves or by the number 1.

## What books did Eratosthenes write?

Eratosthenes’ Geography2010CatasterismiConstellation Myths: With Aratus’s PhaenomenaEratosthenis Geographicorvm FragmentaCatasterismorum ReliquiaeEratosthenes/Books

## What is Aristotle known for in astronomy?

He is sometimes called the grandfather of science. He studied under the great philosopher Plato and later started his own school, the Lyceum at Athens. He, too, believed in a geocentric Universe and that the planets and stars were perfect spheres though Earth itself was not.

## What is Ptolemy known for?

Claudius Ptolemy was a Greek mathematician, astronomer and geographer. Much of medieval astronomy and geography were built on his ideas: his world map, published as part of his treatise Geography in the 2nd century, was the first to use longitudinal and latitudinal lines.

## Why is Eratosthenes called the father of geography?

Eratosthenes was called “The Father Of Geography,” since he was very knowledgeable about the earth. He invented a system of latitude and longitude and he also might have calculated the distance from earth to the sun and invented the leap day. … Eratosthenes contributions to Mathematics are very notable and well known.

## How did Eratosthenes know what time it was?

Eratosthenes actually measured the length of the shadow of a tall building in Alexandria when the Sun reached its highest point in the sky on the Summer Solstice. This corresponds to noon in both Alexandria and Syene, where the Sun cast no shadow at the bottom of a deep well (hence the Sun was directly overhead).

## How do we know the size of the Earth?

Eratosthenes then divided 360° by 7° 12′ and determined that 7° 12′ was 1/50th of a circle. Now all he had to do was find the distance from Syene to Alexandria and multiply it by 50 to get the earth’s circumference.

## What did Eratosthenes discover?

Eratosthenes was especially proud of his solution to the problem of doubling a cube, and is now well known for developing the sieve of Eratosthenes, a method of finding prime numbers. Eratosthenes’ most famous accomplishment is his measurement of the circumference of Earth.

## Why is Ptolemy important to geography?

world map derived from Ptolemy’s Geographia Ptolemy’s most important geographical innovation was to record longitudes and latitudes in degrees for roughly 8,000 locations on his world map, making it possible to make an exact duplicate of his map.

## Who is the first geographer in the world?

EratosthenesEratosthenes came up with the word geography from the roots “geo” (the earth) and “graphein” (to write). He was also the first man ever to be able to calculate the size of the earth (with a minimal 2% error), the earth’s axial tilt, and possibly even its distance from the sun.

## What is Sieve of Eratosthenes method?

In mathematics, the sieve of Eratosthenes is an ancient algorithm for finding all prime numbers up to any given limit. It does so by iteratively marking as composite (i.e., not prime) the multiples of each prime, starting with the first prime number, 2. … It may be used to find primes in arithmetic progressions.

## Where is the father of geography from?

ancient GreeceWho is the Father of Geography? The first person to have used the word Geography ( Greek- Geographika ) was Eratosthenes of Cyrene, the mathematician and astronomer from ancient Greece. He is also widely regarded as the Father of Geography.

## How accurate was Eratosthenes?

However, not everybody used a stadion of the same length. If Eratosthenes used one length for the stadion, his answer was really, really good. The Earth is about 40 thousand kilometers (about 24,860 miles) around. The measurement that Eratosthenes made might have been within about 1% of this.

## What Eratosthenes is famous for?

Eratosthenes, in full Eratosthenes of Cyrene, (born c. 276 bce, Cyrene, Libya—died c. 194 bce, Alexandria, Egypt), Greek scientific writer, astronomer, and poet, who made the first measurement of the size of Earth for which any details are known.

## Who is the father of geography?

EratosthenesEratosthenes, the ancient Greek scholar is called the “father of geography”. He was the first one to use the word geography and he also had a small-scale notion of the planet that helped him to determine the circumference of the earth.

## How far around is the earth?

40,075 kmEarth/Circumference

## How did Eratosthenes estimate the size of Earth quizlet?

How did Eratosthenes measure the circumference of the Earth? He used geometry and ratios to determine the size of the Earth, by basing his calculations on observations of the sun.