Two concentric squares are shown. The edge-line of the outer square is 12 while the edge-length of the inner?

Question

square is 4.

1. Determine h.
2. Determine the area of the shaded region.
See Picture: http://img69.imageshack.us/img69/4731/probss2.jpg

What's the best way to solve this and what answer do you get? Thanks a lot.

Answer 1

1. h = (12 - 4)/2 = 4

2. area = 4*4 + 4*4/2 = 24 units