Identifying Perpendicular Lines: 90-Degree Angle Recognition

Which of the diagrams shows perpendicular lines?

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Step-by-step video solution

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00:00 Which of the lines are perpendicular?
00:03 Perpendicular lines form a right angle at their intersection point
00:08 In this example, the lines form an angle less than 90°
00:11 In this example, the lines form a right angle
00:16 In this example, the lines form an angle less than 90°
00:22 In this example, the lines form an angle less than 90°
00:26 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Which of the diagrams shows perpendicular lines?

2

Step-by-step solution

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

To check if the lines form a 90-degree angle, for each of the drawings a T is drawn at the intersecting point of the lines.

Let's examine figure A:

Note that the lines do not form a right angle.

Let's examine figure B:

We notice that the lines form a 90-degree angle and therefore are perpendicular.

Let's examine figure C:

Note that the lines do not form a right angle.

Let's examine figure D:

Note that the lines do not form a right angle.

3

Final Answer

Practice Quiz

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What do the four figures have in common?

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