Though somewhat disguised, the shaded region is 1/3 of a circle of radius 10 cm. Thus,
Area_circle = pi * r * r = 3.14 * 10 * 10 = 314, and so
Area_Shaded = 1/3 * 314 = 314/3 square cm.
Or if we assume the question is asking to two significant digits (because of its approximation for pi) the answer is 104.67 square cm.
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