consists of area of various geometrical shapes (#2002)

* consists of area of various geometrical shapes

In this program it consists of various area calculation of different geometrical shapes such as (square,rectangle) and many other shapes.

* print(f'Rectangle: {area_rectangle(10, 20)=}')

* Update area.py

* Areas of various geometric shapes:

Co-authored-by: Christian Clauss <cclauss@me.com>