The equatorial circumference of Earth is 24,901 miles (40,075 km). However, from the North Pole to the South Pole, the so-called meridional circumference is smaller, at 24,860 miles (40,008 km).

He had the circumference of planet Earth. A painting depicting Eratosthenes teaching at the Library of Alexandria. 1635 Bernardo Strozzi. Image credit: Alamy. There were two problems. First, ...

He could then use simple proportions to find the Earth's circumference — 7.2 degrees is 1/50 of 360 degrees, so 800 times 50 equals 40,000 kilometers. And just like that, ...

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 degrees, and the circumference of that circle (i.e. the total length of ...

Science teachers in a summer physics class at Southeast Missouri State University relied on shadows Thursday to calculate the Earth's circumference during the summer solstice, the longest day of ...