The place where two (or more) roads cross each other is an intersection.
An example of a perpendicular line is a 4 way intersection at a stop sign. Another example would be a window that has 4 smaller squares in it.
Real life is a real life example!
a Television is a real life example of a Cube A dice is a real life example of a cube
a real life example of an octagon is a stop sign.
The corner of a room is the intersection of two adjacent walls.
A pennant is a real life example of an isosceles triangle.
A real life example of a cliff are the white cliffs of Dover.
A real life example is the chloroplasts found in plant cells.
what is a real life example of limited government
Cytpolasm is an example of cytoplasm in real life: it does exist.
The intersection of life and death.
There are actually quite a few real life examples of a midpoint. The Equator is an example of a midpoint.