Side CD of rectangleADCD measures 12 meters, as shown. Each of the three triangles with a side along segment CD is an equilateral triangle. What is the total area of the shaded regions? Express your answer in simplest radical form.

12 / 3 = 4 m - side of each equilateral triangle on segment CD.

You have 2 of them shaded.

So, the shaded area =2 x [1/2 x sin(60) x 4 x 4] =16sqrt(3) /2 = 8sqrt(3)