Identifying Perpendicular Lines: Finding 90-Degree Intersections

Question

Which lines are perpendicular to each other?

00:00 Which of the lines are perpendicular?

00:03 Perpendicular lines form a right angle at their intersection point

00:09 In this example, the lines form an angle less than 90

00:23 And in this example, the lines don't intersect at all

00:26 And this is the solution to the question

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.