Question 1136797
{{{(12+2x)(12+2x)=180}}}, x is the uniform width of the border;


{{{2*2(6+x)^2=18*2*5=9*2*2*5}}}

{{{(x+6)^2=45}}}

{{{x+6=3*sqrt(5)}}}

{{{x=3*sqrt(5)-6}}}
{{{compute}}}{{{and}}}{{{decide}}}.
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