Algebra-1

The correct answer is: C.Perpendicular lines intersect at a right angle (90°).

Explanation:

By definition, perpendicular lines are lines that intersect at an angle of exactly 90° (a right angle). This is the key characteristic of perpendicular lines.

Here's why the other options are incorrect:

A.Perpendicular lines have slopes that are the same: This is false. Perpendicular lines have slopes that are negative reciprocals of each other, not the same.