Question 785484
Well, you have 2 Shapes, a rectangle, and a square. The square is within the rectangle, and I will assume the "shaded" part is the area of the rectangle without the square.

So, basically, you need to find out the sides of the large rectangle and then add the sides of the square.
Perimeter of Rectangle = 10 + 10 + 20 + 20
{{{ P1 = 2*10 + 2*20}}}
{{{ P1 = 20 + 40 }}}
{{{ P1= 60}}}
Now we add the perimeter of the square
which is {{{ P = 4s}}}
{{{P2 = 4* 8}}}
{{{P2 = 32}}}
This makes the total perimiter 
{{{P = P1 + P2}}}
{{{P = 80 + 32}}}
{{{P = 112}}}


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