Question 989948

{{{c = sqrt (a^2+b^2)}}}.......square both sides


{{{c^2 = (sqrt (a^2+b^2))^2}}}

{{{c^2 = a^2+b^2}}}

{{{c^2 -a^2=b^2}}}

{{{b=sqrt(c^2 -a^2)}}}