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Never! Coplanar means that the two lines lie in the same two-dimensional plane. The only way that two lines do not intersect in two-dimensional space is if they are parallel. And by definition, skew lines are not allowed to be parallel, either.

So essentially there is no such thing as skew lines that only occupy two dimensions. Skew lines must be in three dimensions or higher in order to (1) not intersect and (2) not be parallel with each other.

Q: When are skew lines coplanar?

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skew lines

skew

No, not always. Skew lines are never coplanar, but parallel lines are.

They are called skew lines.

They are called skew lines.

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they are skew lines.

skew

"skew" lines

skew lines

skew

Parallel Lines or Skew Lines.

No, not always. Skew lines are never coplanar, but parallel lines are.

skew lines are noncoplanar lines, which means they aren't parallel and they also don't intersect skew lines do not intersect and are not coplanar

Skew lines can refer to non-coplanar lines and, if that is the case, they cannot cross.

Skew lines are noncoplanar; therefore they're not parallel & don't intersect.

They are called skew lines.

Parallel Lines or Skew Lines.