Question 1055987
I'm not sure I understand. I think what you want is
the new perimeter of the picture with the 2 inch
mat included
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{{{ 11 + 2*2 = 15 }}}
{{{ 14 + 2*2 = 18 }}}
The new dimensions are 15 x 18
Perimeter = {{{ 2*15 + 2*18 }}}
{{{ 30 + 36 = 66 }}}
So, I have 33 in for the length of molding 
around the pioture plus mat
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Get a 2nd opinion, too