https://youtu.be/vgIIDJqep6Q?si=LfqXpWSDd2Qa56Fv
Long ago, people thought the Earth was flat.
however
How did you find out?
Plato's disciple
Due to Aristotle's scientific proof
People learned that the Earth is round.
So who first calculated the Earth's circumference?
and
Just like now 2200 years ago
There were no artificial satellites or astronomical instruments.
Measurement means that it was done indirectly.
In Volume 9 of Civilization and Mathematics
This is a story about Eratosthenes, who was the first to indirectly measure the circumference of the Earth.
I made a shorts video to make it easier to approach.
The link to the main part of Civilization and Mathematics Part 9 is below.
https://youtu.be/n-3LZT5PFcw?si=pFB5E5sGDPyp2won
#Civilization and Mathematics #maths #mathematician #history of mathematics #earth
