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Saddle point

math Maturity 7-9

Some shapes curve in two ways.

Gordena Jackson, Saddle, 1935-1942, NGA 26642.jpg
Gordena Jackson, Saddle, 1935-1942, NGA 26642.jpg
It goes up in one way. It goes down in another way. It looks like a seat for a horse. You can see this shape on a snack chip!
HyperbolicParaboloid.svg
HyperbolicParaboloid.svg
Can you find a shape like this?

49 words
🖼️ Images & Media (8)
File:Saddle point.svg
Saddle point.svg
File:Gordena Jackson, Saddle, 1935-1942, NGA 26642.jpg
Gordena Jackson, Saddle, 1935-1942, NGA 26642.jpg
File:Saddle_Point_between_maxima.svg
Saddle_Point_between_maxima.svg
File:Julia set for z^2+0.7i*z.png
Julia set for z^2+0.7i*z.png
File:x cubed plot.svg
x cubed plot.svg
File:HyperbolicParaboloid.svg
HyperbolicParaboloid.svg
File:Ruled hyperboloid.jpg
Ruled hyperboloid.jpg
File:Monkey_saddle_surface.svg
Monkey_saddle_surface.svg
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📚 Content adapted from Wikipedia | Readability: FK 14.7 | Vital Level 5