F, G and H are the midpoint of AB, AC, and BC. AB = 26, AC = 26, BC = 20, DE = 10, What's the area of shaded part?
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数学PS
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F, G and H are the midpoint of AB, AC, and BC. AB = 26, AC = 26, BC = 20, DE = 10, What's the area of shaded part?
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正确答案: B