6. A large square is formed from 16 small squares of the same size. Then, some of the small squares are removed. How many small squares are missing? To solve this problem, we can fill in the large square by extending the lines of the original picture as shown. The squares marked with an X are the new squares that are missing in the original picture. Let's count the number of squares that have an X in them. 1, 2, 3, 4, 5, 6 Since these 6 squares are missing in the original picture, the answer is C, 6.

large square

small squares

missing squares

counting squares

geometry problem