Question 1209967
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This triangle is equilateral, since all three its sides are congruent segments a = 4 cm.


The area of every equilateral triangle with the side length "a" is

    area = {{{(1/2)*a*(a*(sqrt(3)/2))}}}= {{{a^2*(sqrt(3)/4)}}}  square units.


In this problem,  the area of the triangle is

    area = {{{4^2*(sqrt(3)/4)}}} = {{{4*sqrt(3)}}} = 6.9282 cm^2  (rounded).    <U>ANSWER</U>
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Solved.