In the figure above, PQ is a diameter of circle 0, PR = SQ,and △RST is equilateral. If the length of PQ is 2, what is the length of RT ?
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数学PS
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In the figure above, PQ is a diameter of circle 0, PR = SQ,and △RST is equilateral. If the length of PQ is 2, what is the length of RT ?
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正确答案: D