If ∆ABC ~ ∆PQR, ar(∆ABC) = 16cm2 and ar(∆PQR) = 81cm2. If AB=2 cm. Find PQ.

If ∆ABC ~ ∆PQR, ar(∆ABC) = 16cm2 and ar(∆PQR) = 81cm2. If AB=2

1.	If ∆ABC ~ ∆PQR, ar(∆ABC) = 16cm2 and ar(∆PQR) = 81cm2. If AB=2 cm. Find PQ.
Answer» Abs/pqr=ab/pq16/81=2/pq4/9=2/pqpq=9×2/4pq=4.5 4.5cm