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What mathematical knowledge is needed to calculate the volume of an ellipse? What's in the textbook? Chapters?
If it is an ellipse: area s = pixab;

If it is an ellipsoid, you will use integral knowledge, which belongs to advanced mathematics. It is recommended to watch the sixth edition of Advanced Mathematics (Tongji University) (if you know that this sphere can be obtained by rotating a plane figure, it can be easily obtained by integration).

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