Answer: Choice A) 8
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Explanation:
3D figures can be tricky to visualize when looking at a 2D flat surface.
One way to picture this is to imagine a house. The first floor is what I've highlighted in figure 1 (see attached image below). The second floor is in figure 1, and the third floor is in figure 3.
We have 5 blocks on the first floor, 2 blocks on the second floor, and 1 block on the third floor. This is a total of 5+2+1 = 8 blocks.
