Math Puzzle: Where is the Missing Area?

The square below is made up of two triangles and two trapezoids. The dimensions of the square is 13 by 13, which means that the area is 169 square units.

missing-area-1

The same polygons above are used to create the rectangle below. The dimensions of the rectangle is 8 by 21, which means that the area is 168. » Read more

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