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Did you miss the part where he says the flattening is only 1/300? The polar circle is smaller than the equatorial circle by only a factor of 1 out of 300. Let me give you an experiment. Take a stick as big as your computer screen. Then take another stick of same size but cut out 1/300 part of this stick. Then place the two sticks criss-cross like a + sign. See if you can tell one stick is smaller than the other. Better yet rotate the + sign so you forget how you placed it and then try to tell which one is the smaller stick. Then when you realize your argument was stupid, come back and acknowledge that you learnt something.

@@Kemal-s8w An ellipsoid has a specific mathematical formula so you saying the flattening is only 1/300 wouldn't qualify it to be an ellipsoid so there's that. And forget all your gibberish all you have to do is look at a picture of something to determine if a square is a square or a triangle a triangle or a sphere a sphere.

@@victorneely7964 Any sphere with non-zero flattening is an ellipsoid (also a spheroid) and not a sphere mathematically. Flattening of a spheroid is a mathematical term similar to eccentricity in ellipse. Here is a basic intro: en.wikipedia.org/wiki/Flattening And no if the flattening is too small you won't be able to make out from naked eye. Complete the experiment I told you. That experiment quite literally lets you visualize the amount of flattening earth has. See if you can make out the difference in stick sizess. Children's books use the word sphere because that is a decent approximation for kids. But adults having any exposure to science are expected to know that earth is an oblate spheroid. Also it's okay to be wrong once in a while. If one wants to be pedantic, an ellipsoid is a more generalized spheroid in that while a a spheroid is a sphere compressed from top and bottom, an ellipsoid is additionally also compressed from one other axis. This means that out of the 3 axes of an spheroid, 2 are same whereas all 3 CAN be different for an ellipsoid. Hence every spheroid is an ellipsoid but not every ellipsoid is a spheroid. If you are curious, earth's shape of an oblate spheroid comes directly from its rotation. In fact any rotating fluid body will be slightly flatter at the equator and thus its shape will be that of an spheroid. If you are even more curious, you can derive the figure of 1/300 from the equilibrium of gravitational force and centrifugal force if you can do a little bit of math (equivalent to what we learn at 17-18 years age in India for those who choose physics)

@@victorneely7964 Firstly I didn't say gibberish. I gave you an experiment to visualize a flattening of 1/300. The point is that two lengths which vary by a factor of 1 out of 300 are practically indistinguishable by the human eye. Hence it is impossible to tell from a photograph that earth is not a perfect sphere even though it obviously is not a perfect sphere..

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