An example of concepts about the Earth: Equatorial vs Polar Diameter: Because of this, the diameter of the Earth at the equator is about 43 kilometers (27 mi) larger than the pole-to-pole diameter. As a result, the latest measurements indicate that the Earth has an equatorial diameter of 12,756 km (7926 mi), and a polar diameter of 12713.6 km (7899.86 mi)
This shape, caused by the flattening at the poles, is called an oblate spheroid. My bald head resembles that remark.
The US Navy research keeps adjusting the Pole measurement.
Measurements started 2,000 years ago. Alexandria Eratosthenes peered into a well at noon and came up with the diameter and circumference of our planet.
The world's Navy have since updated it, and updated it. It is harder than you think! Then again, our pole wabbles 30 to 70 feet. And then, there is a gravitational variance if you care to read the US Naval Observatory description of measuring poles to every spot on earth methodology.
OK, so what did that have to do with Newton?
Newton was just another science guy hoping to get funded by Royality.
The talk at the time was about the poles, if it was the same and so on.
Several ancient discoveries at the time claimed the unit of the Inch came from: The distanct from the Earth's Pole to Pole divided by 500,000,000
This from a times before Western society acknowledged the whole sphere thing.
The story goes that Newton knew a popular opportunity when he saw one.
He set out to use something beyond Eratosthenes for accuracy. He did make a major adjustment that stood pat for a long time. It valided the inch story.
Then came modern equipment, space measurement and more.
Newton's adjustmet was re-adjusted.
The Pole-to-Pole distance this year was 7,901 Miles.
7,901 x 5,280 x 12 = 0.5 Billion - OK 0.5006 - off 1/10 of 1%
But Wait... the Earth slowing down is adjusting the pole diameter.
The 5,000 year old story would have been much closer, unless the story was even older.
The Russian science adjust for the gravitational change of 27 miles causing the measurement distortion. After all, they were the first to orbit pole to pole. The Russian measurement pole to pole is 7,892 miles.
NOW do your math! Where do you put the odds the Inch just happens to fit?
So now, your Round Earth is full of conspiricy theries too!