Martin drew a pair of perpendicular lines and a pair of parallel lines.
which of these statements best compares the pairs of perpendicular and parallel lines?
a. perpendicular and parallel lines have their lines extending in one direction only.
b. perpendicular and parallel lines always have a common endpoint.
c. perpendicular lines are lines that intersect at right angles, and parallel lines are lines that never meet.
d. perpendicular lines have only one point lying on them, and parallel lines have no points lying on them.