Which of the following are considered skew lines?
AD and EF
BE and CF
AC and CF
BC and CF
AD and EF.
To determine which pairs of lines are considered skew lines, we need to understand the concept of skew lines. Skew lines are lines that do not intersect and are not parallel.
Looking at the given pairs of lines:
AD and EF: Since we do not have sufficient information to determine if these lines intersect or are parallel, we cannot classify them as skew lines.
BE and CF: Again, without additional information, we cannot determine if these lines intersect or are parallel. So, we cannot classify them as skew lines.
AC and CF: These lines share a common point, C. Therefore, AC and CF intersect at point C, so they are not skew lines.
BC and CF: These lines also share a common point, C. Thus, BC and CF intersect at point C, so they are not skew lines.
Therefore, none of the given pairs of lines are considered skew lines.