In an equilateral triangle with all sides equal to 6 cm, we…

In an equilateral triangle with all sides equal to 6 cm, we let a perpendicular down from the top to the middle of the base. We now have 2 equal triangles in the equilateral triangle. In one of these equal triangles we let again a perpendicular down to the base. What is the measure of the shortest rectangular side, which is the height of the triangle, in this equal triangle?