New answers tagged

1 vote

Why does Eratosthenes method for calculating the circumference of the Earth requires the city of Alexandria and Syene to be in the same meridian?

Below, B is X km north of A, while C is X km west of A. Since A and B are on the same meridian/longitude, the circle through them is a great circle, whose length is (approximately) the same as the ...
user103496's user avatar

Top 50 recent answers are included