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Bunuel

In the figure above, y =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

Attachment:
2017-08-09_1258_002.png

One should know the first few pythagorean triplets by heart.

The first one is 3-4-5. Since 2 sides are 3 and 4, the hypotenuse will be 5. Its total length is 5y so y = 1.

Answer (A)
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