55. Calculate the length of the line in the figure.

Solution:

The figure shows a shape with labeled lengths. To find the total length of the line, we need to sum up all the given lengths.

1. Length of the vertical segment on the left: 7 cm
2. Length of the horizontal segment at the top: 3 cm
3. Length of the vertical segment in the middle: 1 cm
4. Length of the horizontal segment at the top right: 1 cm
5. Length of the horizontal segment at the bottom: 6 cm
6. Length of the vertical segment on the right: 3 cm
7. Length of the horizontal segment at the bottom left: 1 cm

Total length = 7 + 3 + 1 + 1 + 6 + 3 + 1 = 22 cm

Answer: 22 cm