Which lines are perpendicular to each other?
We have hundreds of course questions with personalized recommendations + Account 100% premium
Which lines are perpendicular to each other?
Let's remember that perpendicular lines are lines that form an angle of 90 degrees between them.
In each of the answers, we will draw the letter T at the point of intersection of the lines.
Let's examine figure A:
We notice that the lines do form a right angle and the lines are perpendicular to each other.
Let's examine figure B:
We notice that the lines do not meet and do not form any angle; therefore, they are parallel lines and not perpendicular.
What do the four figures below have in common?
Look for the square symbol at the intersection point! This small square indicates a right angle. You can also check if one line is perfectly vertical and the other is perfectly horizontal.
All perpendicular lines intersect, but not all intersecting lines are perpendicular! Perpendicular lines must meet at exactly 90 degrees, while other intersecting lines can meet at any angle.
Yes! Lines don't have to be horizontal and vertical to be perpendicular. As long as they meet at a 90-degree angle, any two lines can be perpendicular, even if they're both slanted.
Parallel lines run in the same direction and never intersect. If lines don't cross each other, they cannot be perpendicular because perpendicular lines must meet at a single point.
Think of the letter "T" or a plus sign "+"! Both show two lines meeting at right angles. You can even draw a small "T" at intersection points to check.
Get unlimited access to all 18 Parallel and Perpendicular Lines questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime