Question

the circumference of earth was determined by which Muslim scientist​

Answer 1

Answer:

An earliest estimation of it was that given by Eratosthenes (third century BC). After more than a thousand of years, in 9th century, an Abbasid Caliph ordered the first test of this value. Probably in year 820 AD, the astronomers of Caliph Al-Ma'mun determined the equatorial Earth's circumference being 20400 miles.

Answer 2

Answer:

Caliph Al-Ma'mun

Explanation:

An earliest estimation of it was that given by Eratosthenes (third century BC). After more than a thousand of years, in 9th century, an Abbasid Caliph ordered the first test of this value. Probably in year 820 AD, the astronomers of Caliph Al-Ma'mun determined the equatorial Earth's circumference being 20400 miles.

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