1. a. what other lines intersect with the line OS?
b. what other lines intersect with the line NR?
c. what other lines intersect with PQ?
2. a. what line parallel to line LM?
b. what line parallel to line NR?
c. what line parallel to line LO?
3.a.name if possible lines other lines that are concurrent at the point L.
b.name if possible lines other lines that are concurrent at the point R.
C.what lines are concurrent at the point Q?
4.a.what other lines are skew to line OS?
b.what other lines are skew to line PQ?
c. what lines are skew to line MQ?