| dł. 1. | 2 cm | 50 mm | 4 km | 5 m | 4,5 m |
| dł. 2. | 4 cm | 5 cm | 12 km | 50 m | 50 cm |
| Obwód | 12 cm | 20 cm | 32 km | 110 m | 10 m |
2 + 2 + 4 + 4 = 12
50 mm = 5 cm; 5 + 5 + 5 + 5 = 20 cm
32 - 4 - 4 = 24, 24 : 2 = 12
110 - 50 - 50 = 10, 10 : 2 = 5
10 - 0,5 - 0,5 = 9, 9 : 2 = 4,5