a b and c is different because b have to square in side and c have triangle like house and a have a thing that look like a staircase find the area of each shaded region

The area of each figure is the number of blue boxes contained within it.
Hence, for figure A the area is 22.
The area of figure B is 28.
The area of figure C is a little complicated because on the edges we do not have complete blue boxes, rather pieces that are cut.