The long sides of two identical right triangles are put together to form a quadrilateral with an angle of 60 degrees.The shortest side of the right triangle is 3 and what is the area of the quadrilateral?
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数学PS
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The long sides of two identical right triangles are put together to form a quadrilateral with an angle of 60 degrees.The shortest side of the right triangle is 3 and what is the area of the quadrilateral?
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正确答案: C