Question

1. which of the following best defines parallel lines?

a. lines in the same plane that never intersect
b. lines that intersect at a 90° angle
c. lines that cross at one point
d. lines that curve away from each other

1. which of the following best defines perpendicular lines?

a. lines that never touch
b. lines that intersect at any angle
c. lines that intersect to form right angles
d. lines that have the same slope

Explanation:

• For the first question, parallel lines are defined as lines in the same plane that never intersect. Option B describes perpendicular lines (intersect at 90°), option C describes intersecting lines (cross at one point), and option D is incorrect as lines are straight (not curved).
• For the second question, perpendicular lines are lines that intersect to form right angles (90°). Option A is for parallel lines (never touch), option B is too general (any angle is not specific to perpendicular), and option D is for parallel lines (same slope).

Answer:

1. A. Lines in the same plane that never intersect
2. C. Lines that intersect to form right angles