no 27 tolong pake caranya

PQ / TQ = PR/TS
(3 + TQ )/ TQ = 12/8
(3 +TQ) / TQ = 12/8
12TQ. = 8 (3+TQ)
12TQ = 24 + 8TQ
12TQ - 8TQ = 24
4TQ = 24
TQ = 24/4
TQ = 6cm
panjang TQ = 6 cm