10K views · 44 reactions | Eratosthenes accurately calculated Earths circumference using shadows and geometry, a true ancient discovery. #historyfacts #ancient #didyouknow #history | Beyond Belief | Facebook
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This incredibly accurate science experiment was centuries ahead of its time. | Business Insider
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Shadows can help measure Earth’s circumference! 🌍 2,200 years ago, Greek mathematician Eratosthenes used this clever method. By measuring shadow lengths in two cities 794 km apart and applying simple math to relate the angle to the circle’s circumference, he calculated Earth’s size with remarkable accuracy—nearly matching today’s value! It’s a great example of how math isn’t just numbers—it helps us explore, understand, and measure the world around us in incredible ways! — Learn Math the Right
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Shadows can help measure Earth’s circumference! 🌍 2,200 years ago, …
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Eratosthenes calculated the circumference of Earth by measuring the angle of the shadow cast by the Sun at noon in two different locations and using this information to determine the distance between the two points on Earth’s surface. He first measured the angle of the shadow cast in Alexandria, Egypt, which he found to be around 7.2 degrees. At the same time, he also measured the angle of the shadow cast in Syene (now Aswan), which was found to be virtually nonexistent as the Sun was directly o
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Measure the Earth’s Circumference with a Shadow | STEM Activity
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2,000 years ago, Eratosthenes measured Earth’s circumference without satellites or tech! Using shadows, angles, and math, he got shockingly close to modern calculations—long before the world accepted the Earth was round! #storytime #didyouknow #shorts #ancient #history #documentaryshort #earth #worldhistory #mathematics #astronomy #mindblown Read More:https://www.ancient-origins.net/history-important-events/circumference-earth-0015421 | Ancient Origins
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This measurement is more than 2,200 years old, and its accuracy is remarkable
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