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Dear student,S, Uand T are midpoint of PR, QR, PQ.And, PQ=12.4cm, QR=11.2cm , PR=9.2cmT and S are both midpoint, thus by midpoint theorem,TS||PQ and TS=12PQ=12.42=6.2 cmAs, S is the midpoint, so, PS=PR2=9.22=4.6 cmAs, T is the midpoint, so, QT=QR2=11.22=5.6 cmPerimeter of PQTS=PQ+QT+TS+PS=12.4+5.6+6.2+4.6=28.8 cmRegards

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