Question

Take your notebook and get ready to think!

Which of the follwoing would be an example of pair of perpendicular lines?

• A. The double lines in the centre of a road
• B. A road going north crossing a road going west
• C. Line on a sheet of lined paper
• D. none of these

Answer 1

The correct option is B

A road going north crossing a road going west

Perpendicular line - Two lines are said to be perpendicular lines if they intersect forming a right angle, i.e. $90$ degree.

A road going north crossing a road going west forms perpendicular line.

Hence, option $B$ is correct.