Point B is the midpoint of AC . AB=2x and AC=3x+20. What is the value of x?
A:x=-20
B:x=20
C:x=4
D:x=6

3cm and 6 and 9 cm that a possibility of that question

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 : )