What is the mode for the set of data?

6, 7, 10, 12, 12, 13

10
11
12
13

The mode in a set of data is the number that appears most often. In this case, the mode would be 12.

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )