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s-b+a+b+r-a+s+r=2(r+s)
Ans.E
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Bunuel

Which of the following is equal to the perimeter of the figure above?

(A) r + s + a + b
(B) 2r + s + a + b
(C) 2(r + s) – (a + b)
(D) 2(r + s) + (a + b)
(E) 2(r + s)

Attachment:
2017-09-20_1019_002.png

The top left side is equal to s - b and the right-hand side is equal to r - a; thus, the perimeter is:

r + s - b + a + b + r - a + s = 2r + 2s = 2(r + s)

Answer: E
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