The answer's 8 - 10 square units. This is because if you add up the two triangles on the top left, that that makes a single cube. Also, it you take the triangle in the center and add it to a triangle on the bottom right, it makes another cube. The last two triangles can be added up to make more than one cube, so the answer is still 8 - 10 units.
Answer: If anything below sea level is a negative integer then anything above sea level is a positive integer. An integer that could represent a helicopter could be anything from +1 to +1000 and on.
