About 3

　For 3 of the first to come up, it is "Ｓｅｋａi no Nabeatu". He will be the fool when you say the number that take the multiples of 3 or include 3.He became very famous in 2008 by this joke.Please take a look at the video below so very interesting.(He becomes fool when he say the number that take the multiples of 3 or include 3 .And he will comfortably when he say a multiple of 8 in this video.)

 Now, let us look one from a mathematical point of view.

  
I will associate the triangle Speaking 3.The most famous theorem in the triangle, would Pythagorean theorem.

"In mathematics, the Pythagorean theorem — is a relation the three sides of a right triangle (right-angled triangle). In terms of areas, it states:

In any right-angled triangle, the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares whose sides are the two legs (the two sides that meet at a right angle)."

 The approach starts with the same four triangles, except that, this time, they combine to form a square with the side ( a + b ) and a hole with the side c .

  We can compute the area of the big square in two ways. Thus

 

 

simplifying which we get the needed identity.