17. (10 points) There are small sticks of lengths 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, and 9 cm, with one stick of each length. Choose several sticks to form a square (no breaking allowed). How many different ways can this be done? Please draw four of these ways and label the lengths of the sticks.
【Solution】Solution: $1+2+\cdots+9=45$,
The multiples of 4 less than 45 are $4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44$,
Therefore, the corresponding side lengths of the squares should be 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm, 11 cm.

According to the analysis of the problem, the only squares that can be formed using the sticks mentioned in the problem are those with side lengths of 7 cm, 8 cm, 9 cm, 10 cm, and 11 cm,

Side length 7 cm: 7, 1+6, 2+5, 3+4 can form one square
Side length 8 cm: 8, 1+7, 2+6, 3+5 can form one square
Side length 9 cm: 9, 1+8, 2+7, 3+6, 4+5 can form five squares
Side length 10 cm: 1+9, 2+8, 3+7, 4+6 can form one square
Side length 11 cm: 2+9, 3+8, 4+7, 5+6 can form one square
In total, 9 can be formed.
Answer: There are 9 ways to form the squares.
The construction methods are shown in the figure below: