| A | B |
|---|
Coplanar lines that do not intersect,  | Parallel lines (ll lines) |
Noncoplanar lines (lines on different planes). They are neither parallel nor intersecting.,  | skewed lines |
planes that do not intersect,  | parallel planes |
What does Theorem 3.1 state?,  | If two parallel planes are cut by a third plane, then the lines of intersection are parallel. |
A line that intersects two or more coplanar lines in different points,  | transversal |
two nonadjacent interior angles on opposite sides of the transversal,  | alternate interior angles |
two interior angles on the same side of the transversal,  | same-side interior angles |
| two angles in corresponding positions relative to the two lines <6 and <2 are examples, | corresponding angles |
