The diagram shows an octagon consisting of 10 unit squares. The portion below is a unit square and a triangle with base 5. If bisects the area of the octagon, what is the ratio XQ/QY?

AMC 8 2010 Problem 17

AMC8 2010 年第 17 题

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The diagram shows an octagon consisting of 10 unit squares. The portion below \overlinePQ is a unit square and a triangle with base 5. If \overlinePQ bisects the area of the octagon, what is the ratio XQ/QY?

下图是一个由 10 个单位正方形组成的八边形。位于线段底边长为 5 的三角形。若线段

A. $\displaystyle \frac 25$
B. $\displaystyle \frac 12$
C. $\displaystyle \frac 35$
D. $\displaystyle \frac 23$
E. $\displaystyle \frac 34$

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