| 1 | Distance (cm) | Measured (cm) | | Difference (cm) |
|---|
| 2 | 1 | 3 | 2 | 1 |
| 3 | 1.5 | 3 | 2 | 0.5 |
| 4 | 2 | 3 | 2 | 0 |
| 5 | 2.5 | 3 | 2 | -0.5 |
| 6 | 3 | 4 | 3 | 0 |
| 7 | 3.5 | 4 | 3 | -0.5 |
| 8 | 4 | 5 | 4 | 0 |
| 9 | 4.5 | 5 | 4 | -0.5 |
| 10 | 5 | 6 | 5 | 0 |
| 11 | 6 | 7 | 6 | 0 |
| 12 | 7 | 8 | 7 | 0 |
| 13 | 8 | 9 | 8 | 0 |
| 14 | 9 | 10 | 9 | 0 |
| 15 | 10 | 11 | 10 | 0 |
| 16 | 15 | 16 | 15 | 0 |
| 17 | 20 | 21 | 20 | 0 |
| 18 | 25 | 26 | 25 | 0 |
| 19 | 30 | 31 | 30 | 0 |
| 20 | 40 | 41 | 40 | 0 |
| 21 | 50 | 51 | 50 | 0 |
| 22 | 60 | 61 | 60 | 0 |
| 23 | 80 | 81 | 80 | 0 |
| 24 | 100 | 101 | 100 | 0 |
| 25 | 120 | 122 | 121 | 1 |
| 26 | 140 | 142 | 141 | 1 |
| 27 | 160 | 162 | 161 | 1 |
| 28 | 180 | 183 | 182 | 2 |
| 29 | 200 | 203 | 202 | 2 |