Ellipse Mountains
If you cut a cone diagonally and rotate the two parts 180° against each other, they surprisingly fit together again.
This shows the symmetry of the intersection (an ellipse). You can check this out for yourself on this exhibit.
If you cut a cone diagonally and rotate the two parts 180° against each other, they surprisingly fit together again.
This shows the symmetry of the intersection (an ellipse). You can check this out for yourself on this exhibit.