Problem 161. Parallelogram, Midpoints, Octagon, Areas

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In the figure below, ABCD is a parallelogram of area S. S1 is the area of the shaded octagon determined by connecting the midpoints E, F, G, and H with the opposite vertex of the parallelogram ABCD. Prove that Parallalelogram, Octagon, Area Proof.

Parallelogram, Octagon, Area


  

  
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