Réponses

2014-03-31T21:27:24+02:00
Figure 1 : 6x3 + 2x3 = 18 + 6 = 24 cm
Figure 2 : 2x4 + 1x5 + 1x2 = 8+5+2 = 15 cm
Figure 3 : 2x4 + 1x2 + 4x4 = 8+2+16 = 26 cm 
J'espere que je t'ai aidé :)  ;)