Question

define perpendicular lines. a lines in the same plane that intersect. b lines in the same plane that never intersect. c lines in the same plane that intersect to form a 90° angle. d lines in the same plane that intersect to form a 180° angle

Explanation:

• Option A: Just intersecting lines (not necessarily perpendicular).
• Option B: These are parallel lines.
• Option C: Perpendicular lines intersect at a \(90^{\circ}\) angle.
• Option D: Lines forming \(180^{\circ}\) are collinear (not perpendicular).

Answer:

C. Lines in the same plane that intersect to form a \(90^{\circ}\) angle