None of them
Skew line segments are lines in space which never intersect.
Line A is skew to Line B, when line A does not intersect line B and also they are not in the same plane.
That is a line segment that is "skewed up". It doesn't work right. It gets tossed in the heap that becomes other / lesser polygons and such and may even become a dreaded "circle".
sometimes skew
No. Skew lines are lines in different planes that are parallel.
Skew line segments are lines in space which never intersect.
They can be, and are, "skew". If they are not lines, they cannot be "skew lines".
segments that are notcoplanar. (not in the same plane)
Line A is skew to Line B, when line A does not intersect line B and also they are not in the same plane.
Skew lines are lines that do not intersect and are not parallel, typically found in three-dimensional space. They exist in different planes, meaning that no matter how far they are extended, they will never meet. An example of skew lines can be visualized as the edges of a cube that are not in the same plane, such as one edge on the top face and another on the bottom face.
One pair of opposite sides: they may be top and bottom or two sides, or they could both be skew.
EJ Caillouet goes by Ej, and Eeej.
Ej Sepp's birth name is EJ Sepp.
There is no such thing as a skew plane - in isolation. It can only be skew with reference to something else.
Ej Sepp is 6' 3".
EJ Assi is 5' 10".
EJ Caillouet is 5' 11".