Răspuns :
a)8cm+5cm+8cm+5cm si la b si c la fel decat ca la c trebuie sa le transformi in cm
1 a)P =2AB +2BC
P =2*8+2*5 =16+10 =26 cm
b) P =2*3.6+2*2.5 =7.2+5 =12.2 cm
c)1.7dm =170 mm
P=2*170+2*120 =340+240 =580mm
2)P =2AB +2BC
12=2*4 +2BC
2BC =12-8
2BC =4
BC =2cm
P =2*8+2*5 =16+10 =26 cm
b) P =2*3.6+2*2.5 =7.2+5 =12.2 cm
c)1.7dm =170 mm
P=2*170+2*120 =340+240 =580mm
2)P =2AB +2BC
12=2*4 +2BC
2BC =12-8
2BC =4
BC =2cm