कैसे नापा गया था पृथ्वी का आकार? How was earth size measured? How did they measure Earth diameter?

Описание: कैसे नापा गया था पृथ्वी का आकार? How was earth size measured? How did they measure Earth diameter? Think If

How is the size of Earth measured?
How did scientists measure size of Earth?
What is the normal size of Earth?
How big is Earth?
How was the size of Earth first measured?
Determining the earth's size
Measuring the Size of Earth
Calculating the Size of Earth