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View Geometry Puzzle (Geom020)

How big is the shaded area EFGH?

	The length of each side of the square ABCD is 10 cm. The shaded area EFGH is surrounded by 4 curves of quarter circle. How big is the shaded area EFGH?

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026 027 028 029

Hint: Find out how many square cm is the area AED first.

Difficulty level = 3