There are many places where we are see the perpendicular lines and parallel lines in our real life.
Just check out the following collage.
Let us discuss the perpendicular cases:
- The sides of the soccer field with the centre lines
- Television screen with its edges
- Some grills in the window design
- Railway track crossing
- Sign of the first aid kit
Let us check the definition of perpendicular line with an example:
Two different lines intersecting each other at right angle or \(90°\) are called perpendicular lines.
Let us check some more examples:
Let us discuss some of the parallel cases:
- Lines in the race field
- Railway track
- Cars in the queue
- Steel rack shelves
- Sides of the road
Two lines are parallel when they do not intersect each other at any point on the plane.
Two triangular instruments in the geometry box are called as 'Set square'.
- Both the set squares has right angles in it.
- One of the set squares is an isosceles triangle with two angles measuring \(45°\) on the equal sides.
- Other set square is a scalene triangle with two angle measuring \(30°\) and \(60°\).
Uses of Set square:
- To construct the specific angles \(90°\), \(45°\), \(30°\) and \(60°\).
- To draw parallel and perpendicular lines.
- To measure the height.