Answer:
4cm
I wrote on paper as well to be more specific.
Explanation:
The formula that determines the area of a equilateral triangle is (√3/4)*a^2
where a is the side of triangle.
so 4√3=(√3/4)*a^2
(4√3)/(√3/4)=a^2
((4√3)*4)/√3=a^2
16=a^2
a=√16
a=4
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