In this context, an ellipse is equivalent to a circle: it has one edge and one face and no vertices.
Ellipse has no sides and
Two
2
No. Both foci are always inside the ellipse, otherwise you don't have an ellipse.
In this context, an ellipse is equivalent to a circle: it has one edge and one face and no vertices.
There are any number of shapes without flat faces including: > circle > ellipse > blob
Ellipse has no sides and
An ellipse has 2 foci. They are inside the ellipse, but they can't be said to be at the centre, as an ellipse doesn't have one.
None; an ellipse is a smooth curve, not a line.
An ellipse has rotational symmetry of order 2.
Two
None.
An ellipse has two lines of mirror symmetry: the line that includes the two foci of the ellipse and the perpendicular bisector of the segment of that line between the two foci.
2
360 degrees.
2