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QS= (PS)(sin P)/(sin Q)
QS = (4√2)(sin 45) /(sin 30)
QS = (4√2)(¹/₂√2) /(¹/₂)
QS =8

QR² = SR²+QS² – 2(SR)(QS) cos 60°
QR² = 4+64- 2(2)(8)(¹/₂) = 52
QR = 2√13