Identifying Perpendicular Lines: 90-Degree Angle Analysis

Video Solution

Solution Steps

00:00 Which of the lines are perpendicular?

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

00:11 In this example, the lines form an angle greater than 90

00:28 In this example, the lines form an angle less than 90

00:35 In this example, the lines form a right angle

00:44 In this example, the lines form an angle greater than 90

00:48 And this is the solution to the question

Step-by-Step Solution

Let's remember that perpendicular lines form a 90-degree angle.

In each of the answers, we will draw the letter T at the intersection point of the lines.

Let's examine figure A:

We notice that the lines do not form a right angle and therefore are not perpendicular.

Let's examine figure B:

We notice that the lines do not form a right angle and therefore are not perpendicular.

Let's examine figure C:

We notice that the lines do not form a right angle and therefore are not perpendicular.

Let's examine figure D:

We notice that the lines do form a right angle therefore are perpendicular lines.