bonsoir
Anatole prend les 2/7 donc reste les 5/7
Berthe = 5/7 x 2/3 = 10/21
2/7 + 10/21 = 6/21 + 10/21 = 16 /21
Casimir = 5 /21
105 x 70 =7 350
aire = 7 350 m²
Anatole = 7 350 x 2 /7 = 2 100 m²
Berthe = 7 350 x 10/21 = 5 600 m²
Casimir = 7 350 x 5/21 = 1 750 m²
1 cm plan = 1 000 cm réels