<Dl> <Dd> y 2 = x 2 + C . (\ displaystyle y ^ (2) = x ^ (2) + C .) </Dd> </Dl> <Dd> y 2 = x 2 + C . (\ displaystyle y ^ (2) = x ^ (2) + C .) </Dd> <P> The constant can be deduced from x = 0, y = a to give the equation </P> <Dl> <Dd> y 2 = x 2 + a 2 . (\ displaystyle y ^ (2) = x ^ (2) + a ^ (2).) </Dd> </Dl>

A square plus b squared equals c squared