The perimeter of the shape is:
[tex]10+10+10+10+20\pi[/tex]This comes from the fact that we have four sides of lenght 10 and one full circle (remember that the perimeter of the circle is pi*D).
Therefore, the expression that correctly calculate the perimeter are:
[tex]40+20\pi[/tex]and
[tex]10+10+10\pi+10+10+10\pi[/tex]