Since, △ABC≅△PQR ⇒ AB/PQ = BC/QR = AC/PR ∠A = ∠P, ∠B = ∠Q, ∠C = ∠RBut, BC = 2BD and QR = 2QMHence, AB/PQ = BD/QM = AC/PRIn △ABD and △PQM,AB/PQ = BD/QM and ∠B = ∠QBy SAS similarity, △ABD≅△PQM,∴ AB/PQ = AD/PMHence Proved