Question

If ∆ABC ~ ∆DEF and AB = 5cm, ar(∆ABC) = 20cm2 , ar(∆DEF) = 45cm2 then DE = (a) 4 5 (b) 7.5cm (c) 8.5cm (d) 7.2cm

Answer 1

Step-by-step explanation:

by using formulas we can find it.....................