Slide 1 of 9, Example one. A series of three images. Each image shows a right angled triangle. The first triangle has vertices labelled A, B, and C. The right angle is at vertex C. The second ...

Mohammed Ben Alhocain, in an Arab manuscript of the 10th century, stated that the principal object of the theory of rational right triangles is to find a square that when increased or diminished by a ...