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what is Pythagoras Theorem ?

The Pythagorean theorem or Pythagoras' theorem is a relation in Euclidean geometry among the three sides of a right triangle (right-angled triangle).
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).



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