erathosthenes was the first ,
A circumference of 47.12 feet.
A circle with a radius of 4 miles has a circumference of 25.13 miles.
== == Given that the circumference of the earth is 40,075.02 km (measured at the equator) the circumference in inches is roughly 1,577,756,664 inches.
Eratosthenes is said to have calculated the Earth's circumference to such a high accuracy. The major problem with these claims is that he estimated the circumference in terms of stadia. There were several different versions of the stadion and nobody knows the modern equivalent of the stadion used for his result! If the stadion is taken to be a Hellenic standard, of 185 metres, then the claim is true.
Best guess for Earth Circumference is 24,900 miles (40,080 km)
Eratosthenes
Eratosthenes is credited with calclating the circumference of the Earth at the equivalent of 25,000 miles/40,000km in about 205 BCE.
Eratosthenes
A circumference of 47.12 feet.
Eratosthenes of Cyrene (276 BC - 194 BC) was a Greek mathematician, poet, athlete, geographer and astronomer. He made several remarkable discoveries and inventions: he devised a system of latitude and longitude. He was the first person to calculate the circumference of the Earth with remarkable accuracy, and the tilt of the earth's axis.
He was an ancient Greek mathematician of the 2nd/3rd century BC, as well as a poet, geographer, musical composer, scholar, and astronomer. He was the first Greek to estimate the circumference and tilt of the earth. He created a map of the earth based on the knowledge available at the time. He was highly respected, and his calculations of the earth's circumference were used for hundreds of years. Today, his method for finding prime numbers from 1-100 is known as the 'Sieve of Eratosthenes' and is taught in math textbooks.
The size of the Earth is measure in parameters generally, and it is estimated and believed to be measured at around over 40,000km in circumference, and over 500 million km squared in terms of surface area.
The Earth is 3.64 times larger than Moon's Circumference. (Earth's Circumference) 39,843 divide by (Moon's Circumference) 10,921=3.64
The circumference of Venus is very nearly the same as the Earth's. The Earth has a circumference of about 40,000 km while Venus has 38,000 km, making Venus' circumference about 95% the circumference of the Earth.
Eratosthenes was the first to measure the Earth's circumference pretty acurately.
A circle with a radius of 4 miles has a circumference of 25.13 miles.
Essentially, yes. The earth accumulates cosmic dust, meteorites and the occasional comet, but not at a rate significant enough to appreciably change the earth's circumference. The sinking of heavy rock, such as caused by the recent 8.8 magnitude earthquake in Chile also does not measureably change the earth's circumference. Some scientists estimated earth's rotational velocity may have accelerated as much as a millionth of a second per day from that earthquake, however. The motion of the continental plates about earth's surface does not appreciably affect earth's circumference either. These plates move about on a half billion year cycle known as the Wilson Cycle.