Question

) ∆ABC and ∆DEF are equilateral triangles, A(∆ABC): A(∆DEF)=1:3 If AB = 3 cm then what is the length of DE​

Answer 1

Answer:

9cm

Step-by-step explanation:

hope this helped you

Answer 2

A(∆ABC):A(∆DEF)= 1:3

A(∆ABC)=1x, A(∆DEF)=3x

∆ABC and ∆DEF are equilateral , so congruent to each other.

AB=3

AB:DE=1:3

3:DE=1:3

DE=9

therefore DE=9cm