Question 1008577

given:

{{{a=5}}}
{{{c=13}}}

to find:

{{{b}}}

use Pythagorean theorem:

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

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

{{{b^2=13^2-5^2}}}

{{{b^2=169-25}}}

{{{b^2=144}}}

{{{b=sqrt(144)}}}

{{{b=12}}}