pythagorean theorem

from The Free On-line Dictionary of Computing (8 July 2008)

Pythagoras's Theorem
Pythagorean Theorem

   <mathematics> The theorem of geometry, named after
   {Pythagoras}, of Samos, Ionia, stating that, for a
   right-angled triangle, the square of the length of the
   {hypotenuse} is equal to the sum of the squares of the lengths
   of the other two sides.  I.e. if the longest side has
   length A and the other sides have lengths B and C (in any
   units),

   	A^2 = B^2 + C^2

   (2004-02-12)