Question

The number of right angles formed by a pair of perpendicular lines is _____.

• A. 2
• B. 1
• C. 3
• D. 4

Answer 1

The correct option is D 4

A perpendicular is defined as a straight line that makes the right angle (90 degrees) with the other line.


In the above figure, the line $m$ and line $l$ intersect each other at right angles.
Hence we can see that, when two lines are perpendicular to each other, they form 4 right angles (90 degrees).