Write the pythagorean theorem how do you find a when b and c are known? how do you find c when b and a are known

Well something for example.Would be if you were a contactor,you need to find measurements of lots of things. For example that could be needing to find the sum of 2 sides.And find the sum of the 2 sides of that right trainagle can determine  if the biulding has a good foundation . And thats how you can use a Pythagorean Theorem  in the real world !
 

Yes you do, so £1973.09 - £1473.50 = £499.59 so tim overpaid £499.59 .hope this ; )