Question 266431
this  is a 3 dimensional pythagorean theorem and is expressed as
{{{d = sqrt(l^2 + w^2 + h^2)}}}
or
{{{d = sqrt(5^2 + 4^2 + 3^2)}}}
which is
{{{d = sqrt(25+ 16 + 9)}}}
or
{{{d = sqrt(50)}}}
so,
 d = 5sqrt(2)