Question 975257
Do you want to find the outer frame length for either dimension?  How does the blue border relate this this?


p perimeter,
x picture length, same for both directions because square picture
{{{p=4x}}}
-


{{{x=p/4}}}


Using u as the uniform width for the blue border around picture,
{{{x+2u=highlight(p/4+2u)}}}.


Substitute the values given if you want the value.



28