·The Pythagorean Theorem states that in any rigth triangle, the square of the hypotenuse (The longest side of a right triangle ) is equal to the sum of the squares of the legs ( the two shorter sides of the triangle, which make a right anlge).
·Pitágoras de Samos ca. 569. BC – ca. 475. C.1) was a Greek philosopher and mathematician considered the first pure mathematician.
·Theorem estimated demonstrated by similar triangles: counterparts sides are proportional.