The lines on a highway
Cutting a sheet of plywood
some real life examples are a water bottle, pipes, cans
Dropping a bullet and shooting a bullet at the same time. They will touch the ground at the same time because they are perpendicular vectors.
bee's hive
stand up... that is a perpendicular line right there. you are 90 degrees with respect to the floor.
Real life example of parallel lines are railroad tracks and rows in a garden. Also the lines on a basketball court are parallel
the lines of the brooklin bridge
Railway lines with sleepers? Lines of latitude crossed by a line of longitude?
stop signs chairs roads boxes
The walls of most buildings are perpendicular to the ground they are built on.
roads
If the walls in your house were not perpendicular they would probably topple over and you would no longer have a daily life for perpendicular lines to affect.
The lines on a highway
There are many in life. I'll give some examples. Like, a butterfly. And a boat. Oranges also have two lines of symmetry.
A real life example of a line is a road. Other examples of lines include ball courts, driveways, roof tops, and buildings.
Just one example: If you want to build something like a cabinet, you would want the sides to be perpendicular to each other, and to the top and bottom. Otherwise the door may not open and close correctly.