Question

cine ma poate ajuta la ex 2.?

Answer 1

Desen 1: 6+8+6+6+4+4+2+2=38 patratele
Daca 2 patratele inseamna 1 cm, atunci pt a afla cati centrimetri reprezinta 38 patratele, impartim la 2:
38:2=19 cm

Desen 2: 2+6+2+6+2+6+2+6+2+6+2=2*6+6*5=12+30=42 patratele
Daca 2 patratele inseamna 1 cm, atunci pt a afla cati centrimetri reprezinta 42 patratele, impartim la 2:
42:2=21 cm

Desen 3: 6+2*15=6+30=36 patratele
Daca 2 patratele inseamna 1 cm, atunci pt a afla cati centrimetri reprezinta 36 patratele, impartim la 2:
36:2=18 cm