Question

Triangle ABC and triangle DEF are equilatera triangles. If area of triangle ABC :area of triangle =1:2 and AB=4 ,then what is the length ofDE?

Answer 1

Answer:

Step-by-step explanation:

area of equilateral triangle=√3/4*(side)²

ar(ΔABC):ar(ΔDEF)=AB²:DE²

1:2=4²:DE²

DE²=32

DE=4√2 UNIT