• Pythagoras was a renowned Greek philosopher and
mathematician who lived around 550 BC
who is famous for proving a theorem
about the right-angled triangle.
• Pythagoras' theorem says that the area
of the square built upon the hypotenuse
of a right-angled triangle is equal
to the sum of the areas
of the squares upon
the remaining sides
or c^{2} = a^{2} + b^{2}.