please tell someone
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Step-by-step explanation:
SP = RQ
TR = ST
since triangle is equilateral and sides are equal to square
/_ PST = 60+ 90 = 150
/_TRQ = 60+90 = 150
By SAS congruence
PT = QT
/_ SPT = /_ STP = x
/_SPT + /_STP + /_TSP = 180
2x + 150 = 180
x= 30/2 = 15
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