Determining the earth's size
Eratosthenes Measurement of the Radius and Circumference of the Earth - Projeda
Calculating the Earth's Circumference at Any Date from Any Location - Wolfram Demonstrations Project
Eratosthenes' measurement of Earth's circumference – GeoGebra
This measurement is more than 2,200 years old, and its accuracy is remarkable - ABC News
eratosthenes.gif
How Did Eratosthene Calculate The Circumference Of Earth In 240 BC? » Science ABC
Keyah Math - Numerical Solutions for Culturally Diverse Geology
The History of Geodes: Global Positioning Tutorial
Earth's Circumference, Eratosthenes, Astronomy, Solstices, Equinoxes, Latitude, Science, and Math Activity
How to Determine the Earth's Circumference - dummies
Earth's circumference - Wikipedia
How Eratosthenes calculated the Earth's circumference - YouTube
Determining the earth's size
Calculating the circumference of the Earth
Angles & Arc Length: Discovering Earth's Circumference (cont.)
Eratosthenes Calculation of the Circumference of the Earth
How Eratosthenes Calculated the Earth's Circumference
How did Eratosthenes calculate the circumference of the earth? - Quora
Eratosthenes - Measuring the Circumference of the Earth in 240 BC
This measurement is more than 2,200 years old, and its accuracy is remarkable - ABC News
Eratosthenes | Biography, Discoveries, Sieve, & Facts | Britannica
Circumference of the Earth - Universe Today
How Ancient Scientists Calculated The Circumference Of The Earth - Ancient Pages
Measuring Shadows to Calculate the Size of Earth | NSTA
What is the Circumference of the Earth? Calculation, Examples
Circumference of Earth - What is the circumference of the Earth, Calculation of Earth's circumference, Solved Examples.
Earth's circumference - Wikipedia
