Two lines are intersecting if they have exactly one point in common.
because
No, you could define a plane as comprising only two lines.
Object lines are dark, thick lines used to define an object.
It depends on how you define "ways" and how you define "lines" and how you define "intersect" and what kind of geometry you're talking about, but in Euclidean geometry, lines either never intersect, or they intersect at a single point, or they can intersect at all points within the lines.
They are both lines that define the tropics. Without any of them, the tropics would not exist.
If they are straight lines, then they define a plane in which both lines lie.
Meridians.
Yes. The two lines define a plane which they both belong to.
The goal of nitrition advice
They're called lines.
Two lines which intersect each other which form a 90o angle at the intersection.