Question

Ar(∆ABC)/Ar(∆DEF) = 1/3 and ∆ABC~∆DEF , if DE = 5 cm find AB​

Answer 1

Step-by-step explanation:

We know that

ar(∆ABC)/ar(∆DEF) = AB²/DE²

1/3 =AB²/DE²

1/√3=AB/DE

1/√3 =AB/5

AB=5/√3