∆ABC~∆PQR and ar(∆ABC) = 4, ar(∆PQR). If BC = 12cm, find QR.

Answer:

Given,

???????? ( ∆ ???????????? ) = 4???????? (∆ ???????????? )

(1)  

∵ ∆ABC ~ ∆PQR

(2)  

(3)  

(4)