2. (8 points) The area of the largest square in the figure is 64, the area of the shaded part is $(\quad)$
A. 28
B. 32
C. 36
D. 40
【Solution】Solution:
From the figure above, we can see that the shaded part consists of 28 small triangles, and the blank part consists of 36 small triangles. The area of each small triangle is $64 \div (28+36)=1$

Therefore, the area of the shaded part is $28 \times 1=28$. Hence, the correct choice is: A.