The following applet is a mathematical pattern which comprises of a 7 12-sided regular polygons and every polygon has 6 squares, 6 rectangles and 1 regular hexagon, side of each of them is equal to the side of 12-sided regular polygon.
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Find the area of the whole figure, given the side of the 12-sided polygon as 'a',
(hint:find the area of all the squares, triangles and the hexagons. and add them)