Pythagoras travels with his father to Alexandria where they meet a builder named Neferheperhersekeper (Nef). Nef shows Pythagoras how to use a knotted rope to form a right triangle, a technique he uses in measuring square corners for cutting stone. Pythagoras experiments with this technique and observes the characteristics of right triangles. With time, a right triangle and some building tiles, Pythagoras discovers the mathematical relationship among the sides of the triangle and begins to use this knowledge to solve real-world problems. This book lends itself to a discussion of the problem-solving process and to a deeper understanding of the Pythagorean Theorem.--Ministry of Education website.

Mathematics grade 8 (2008).