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HallsofIvy

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[tex]\frac{x^2}{a^2}+ \frac{y^2}{a^2}+ \frac{z^2}{b^2}= 1[/itex]

assuming that the z axis points toward the stem of the wind glass, then the base of the bowl is at (0, 0, -b) and the bowl starts to narrow at z= 0, where the circle around the bowl is [tex]x^2+ y^2= a^2[/itex].

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CRGreathouse

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HallsofIvy

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CRGreathouse

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Yes, that. :)perpendicularto the major axis, passing through the center of the ellipsoid.

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In a given ellipsoid, the circle in a plane perpendicular to the major axis and passing through the center has the greatest radius. Can this circle be said to represent theperpendicularto the major axis, passing through the center of the ellipsoid.

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