How Eratosthenes calculated the Earth's circumference

(2:2)

Eratosthenes - Measuring the Circumference of Earth

(8:31)

Carl Sagan explains how Eratosthenes calculated circumference of the Earth

(2:14)

How did Eratosthenes calculate the circumference of the Earth?

(1:36)

Carl Sagan - Cosmos - Eratosthenes

(6:42)

ERATOSTHENES

(2:31)

Measuring Earth's circumference with a stick (in 245 BC)

(3:50)

How the Ancient Greeks Proved that the Earth was Round

(7:49)

How Eratosthenes measured the circumference of the Earth

(3:24)

North Woods Scientist Measuring Circumference of Earth

(10:53)

Eratosthenes - Measuring the Earth

(13:33)

Eratosthenes: Measuring the Earth with Geometry

(3:)

Eratosthenes

(7:29)

How to Measure Earth?

(3:50)

Eratosthenes - Measuring the Earth

(7:42)

Physical Science 9.1f - Eratosthenes

(9:4)

Eratosthenes Measures the Circumference of the Earth | Popular Maths | Nagwa

(10:)

Shadows can help measure Earth’s circumference! 🌍

(1:)

How Did Eratosthenes Measure The Size Of The Earth ? || Dr Roy Casagranda

(49)

How to Measure the Earth's Circumference

(9:8)