Identifying Perpendicular Lines: Visual Geometry Analysis

Question

Which of the following diagram shows perpendicular lines?

00:00 Find the perpendiculars

00:03 A perpendicular is a line that forms a right angle at the intersection point with another line

00:07 Therefore all these lines are perpendicular

00:10 And this is the solution to the question

Remember that an angle is a straight line that forms a right angle of 90 degrees with another straight line.

In answer A, we can identify a right angle, therefore in diagram A there is an angle.