GRE Math Challenge Question #30:
What is the length of the side labeled x of the polygon shown below if the perimeter is 40 inches?
A. 6 Inches
B. 8 Inches
C. 10 Inches
D. 16 Inches
E. 20 Inches
Explanation:
The sum of the sides is the perimeter of the figure.
There are four sides that measure 6 inches, so 4 × 6 is 24. Subtract 40 – 24 to get 16 inches for the remaining two sides. Divide 16 by 2 since the two sides are the same measure.
Therefore, x = 8 inches.
Correct Choice : B (8)
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