Figure 1 Figure 1 km² km² Figure 4 Figure 2 1 km² = hm' Figure 2 Illustrations du cours = 1 cm² hm² Figure 3 hm² dam' 1 hm' = Figure 3 dam 1 dam' =. da m² Unité ✓ Unité = 100 mm² m² m² 1m' dm² 1 dm² = dm² 194 m' cm² 1 cm² =... cm² dm² mm² 1 mm' = mm² 1010 cm²​