Someone used the shadows of two identical sticks at the exact same time in two different cities a know distance away
Mmm, well the Earth is round and not square, so it cannot be measure in a flat line, but has to be measured along the curve or around the circumference. The circumference of the Earth at the Equator, its widest point is 40,075 km (East/ West measurement). Its meridian circumference is 40,007 km (North/ South measurement - North Pole through the South Pole and back to the North Pole); which means the Earth is a little "shorter" than it is wide. There are 100 cm in 1 meter, multiply this by 1000 meters and you have 100,000 cm in 1 kilometer. Therefore: The equatorial circumference of the Earth is: 40,075 km x 100,000 cm = 4,007,500,000 cm The meridian circumference of the Earth is: 40,007 km x 100,000 cm = 4,000,700,000 cm; if you divide this by 2, this will give you the distance from the North Pole to the South Pole in cm, which is 2,000,350,000 cm
Greek scientists study the circumference of earth because science flourishes the Hellenistic era.
State the problem: How can we prove Earth is round and calculate its circumference? Make a hypothesis: If the sun casts shadows at different angles at the same time of day in different places, we can determine how much Earth curves. Make observations and collect data: In Syene, the sun's rays are vertical at noon. At the same time in Alexandria, the rays are 7.2 degrees from the vertical.
The circumference of the Earth at the Equator is 40,075.02 kilometres, or 40,075,020 meters.
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Two points, (a) and (b), 1000 km apart; the curvature of the earth between (a) and (b).
He postulated the circumference of the earth.
You can use the relationship between the circumference of the Earth and the circumference of the smaller latitude to calculate the Earth's circumference. Multiply the circumference of the smaller latitude by the cosine of the latitude. This will give you the circumference of a circle at that latitude, which can then be used to estimate the Earth's circumference.
The average radius of the Earth is 3,959 miles. The equitorial diameter of the Earth is about 7,926 miles. The ratio of the circumference to the diameter of a circle is written as the symbol pi. Pi is approximately 3.141592. Therefore, to determine the circumference from the diameter given above: equitorial diameter x 3.141592 = equitorial circumference = 7,926 x 3.141592 = 24,900 = The earth has a circumference of approximately 24,900 miles. More precisely the circumference of the earth at the equator is 24,902 mi. Remember that the earth is not a completely rounded sphere.
The circumference of the Earth is 4,007,500,000 centimeters (four billion, seven million, and five hundred thousand centimeters). See the Related Link below for more information.
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
Earth's circumference is greatest at the equator, where it measures approximately 24,901 miles (40,075 kilometers). This is due to the Earth's shape being an oblate spheroid, which means it bulges at the equator and is flatter at the poles.
== == 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.
One possible person is Eratosthenes of Cyrene ~230 BC as he was a Greek scientist who calculated the circumference of the Earth, with remarkable accuracy (some values for the "stadia" he used gives a result within 6% of the actual polar circumference). See link for further information
Multiply the diameter by pi to find the circumference
The circumference of the Earth at the equator is 24,902 miles. From pole to pole is 24,860 miles.
Best guess for Earth Circumference is 24,900 miles (40,080 km)