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Mathematics 18 Online
OpenStudy (anonymous):

In parallelogram QRST, QS RT. Is QRST a rectangle? YES NO Can not be determined (picture) https://sphotos-a.xx.fbcdn.net/hphotos-prn2/992930_630275683659037_1319279460_n.jpg plz give me the best answer. i don't want to fail again ;(

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