2006 Cyprus MO/Lyceum/Problem 8

Problem

In the figure $AB\Gamma \Delta E$ is a regular 5-sided polygon and $Z$ , $H$ , $\Theta$ , $I$ , $K$ are the points of intersections of the extensions of the sides. If the area of the "star" $AHB\Theta \Gamma I\Delta KEZA$ is 1, then the area of the shaded quadrilateral $A\Gamma IZ$ is

A. $\frac{2}{3}$

B. $\frac{1}{2}$

C. $\frac{3}{7}$

D. $\frac{3}{10}$

E. None of these

Solution

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2006 Cyprus MO, Lyceum (Problems)
Preceded by Problem 7	Followed by Problem 9
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2006 Cyprus MO/Lyceum/Problem 8

Problem

Solution

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