If the area of each triangular regions is as shown, what is the area of the polygon?

For this case, what you must do is add the area of each of the triangles to find the total area of the polygon.
 We have then:
 A = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
 A = 16
 Equivalently, as the area of each triangle is the same, then:
 A = 2 * (8)
 A = 16
 
 the area of the polygon is:
 16
 Option 3