Question 1030500
Segment connecting one vertex to the midpoint of opposite side forms a shared leg of two special right triangles.  Legs will be 2, y, and 4.  One of the leg lengths, that being shared, is the value of y.  You should be able to draw and label the description with no trouble.


Either of the two right triangles:
{{{2^2+y^2=4^2}}}
What is y?


Once y is solved, find the area of the whole equilateral triangle:
{{{(1/2)4*y}}}-------here, the base being 4, and the height or altitude being y, for whatever value you earlier found for y.