Description: Learn to break up irregular shapes into smaller geometric shapes to determine area. Created by Sal Khan. We know that this side right over here has a length of 3.5. So given that, let's see if we can find the area of this entire figure. And they give us all of the dimensions for them, or at least they give us the base and the height for it, which is enough to figure out the area.*Teacher Advisor is 100% free.