" Explain,why "Delta ABC[-=-?]Delta FEL

Explain,why Delta ABC[-=sim?]Delta FED

Explain, why Delta ABC ~= Delta FED

In Delta ABC .

In a Delta ABC

It is given that Delta ABC - Delta PQR , with (BC)/(QR) = (1)/(4) . Then (ar Delta PQR)/(ar Delta ABC) is equal to:

It is given that Delta ABC cong Delta RPQ .Is it true to say that BC =QR ? Why ?

It is given that Delta ABC cong Delta RPQ .Is it true to say that BC =QR ? Why ?