Question

∆ABC and ∆DEF are equilateral triangles. If A(∆ABC) : A(∆DEF) = 1 : 3 and AB = 4, then find DE​

Answer 1

Answer:

∆ABC and ∆DEF are equilateral triangles. If A(∆ABC) : A(∆DEF) = 1 : 3 and AB = 4, then find DE​

Step-by-step explanation:

then ab=4 then DE=        

IAM NOT SURE ABOUT THIS

Answer 2

Answer:

Consider,

A(∆ABC) : A (∆DEF) = 1 : 3

⇒A(ΔABC)/A(ΔDEF)=1/3

⇒A(ABC) /A(DEF) = AB/DE

⇒1/3 = 4/DE

⇒DE=4×3

⇒DE=12