We have a central rectangle with a width of 4 and a height of 2
The area of this = 4 * 2 = 8
And we have two triangles on either end with bases of 6 and altitudes of 2
So the areas of these are 2 (1/2) (6) (2) = 12
So......the area of the arrow = 8 + 12 = 20
