Question

Let ∆ABC ~ ∆DEF. If ar(∆ABC) = 225 cm2

, BC = 3 cm and EF = 7 cm, then find ar(∆DEF).​

Answer 1

Step-by-step explanation:

Answer

△ABC∼△DEF

⟹Ar(ΔDEF)Ar(ΔABC)=(EFBC)212164=(15.4BC)2BC=12164×15.4BC=118×15.4=11.2cm