Question

sample response: parallel lines never intersect, but they must be in the same plane. the definition does not require the undefined term point, but it does require plane. because they intersect, perpendicular lines must be coplanar; consequently, plane is not required in the definition. what did you include in your response? check all that apply. parallel lines do not intersect. parallel lines must be coplanar. perpendicular lines intersect at one point. perpendicular lines intersect so plane is not required in the definition.

Explanation:

The sample response mentions that parallel lines never intersect and must be in the same plane (coplanar), and that perpendicular lines intersect which means the concept of plane is not needed in their definition. All the listed statements in the check - boxes are consistent with the sample response.

Answer:

Parallel lines do not intersect.
Parallel lines must be coplanar.
Perpendicular lines intersect at one point.
Perpendicular lines intersect so plane is not required in the definition.