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diagonal PR dan QS berpotongan di titik T.sdt PST=70°,sdt TQP=50°,dan sdt TPQ=30°.tentukan bsr sudut sudut yg lain!
PTQ = STR = 100'
QTR = PTS = 80'
TPS = 30'
SRQ = 60'
TSR = 50
RSP = 70 + 50
RSP = 120
SPQ = 180 - 120 (sepihak)
SPQ = 60
TPS = 60 - 30
TPS = 30
SRQ = SPQ
SRQ = 60
RQP = PSR
RQP = 120