Fatal error Mathematical Concepts are taught from generation to generation Part II

Fun For Brain
The concept of built flat (square area):
Square is built flat which has characteristics - traits as follows:
a. Four corners is a right angle - the elbow. (We declare the truth)
b. Four sides equal in length. (we express this concept is a very fatal mistake)
c. Has 4 and 4 fold symmetry symmetry round. (We declare the truth)

As a result of the above misconceptions:
When you are informed by previous teaching faculty provide a proof to you that the formula of "Area of square is the side x side", the concept began when an error occurs.
From the above statement, we can be accountable and we can give the following explanation:
Every wake up any flat shape having a side which only the white side when we draw a square on the paper picture, while lines that form the square are called ribs. So who's right, the formula Area of square = side x side. So should the nature of the above should be changed to four ribs equal in length.
By. Fun For Brain