∆ABC~∆PQR and ar(∆ABC) = 4, ar(∆PQR). If BC = 12cm, find QR. contexto.130 3 years ago Answer: Given, ???????? ( ∆ ???????????? ) = 4???????? (∆ ???????????? ) (1) ∵ ∆ABC ~ ∆PQR (2) (3) (4)