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Verified answer
KesebangunanMatematika IX
(a).
AB / PQ = BC / QR = AC / PR
∠ABC = ∠PQR
∠BCA = ∠QRP
∠BAC = ∠QPR
(b).
AC / PR = AB / PQ
AC / 4 = 15 / 5
AC = 4 x 3
AC = 12 cm