Odpowiedź :
[tex]a)\\Ob = 7 \ cm + 3 \ cm + 4 \ cm + 4 \ cm + 3 \ cm + 7 \ cm = 2(7+3+4) \ cm = 2\cdot14 \ cm = 28 \ cm[/tex]
[tex]b)\\Ob = 2\cdot5 \ cm + 3 \ cm+ 7 \ cm + 2 \ cm = 10 \ cm+12 \ cm = 22 \ cm[/tex]
[tex]a)\\Ob = 7 \ cm + 3 \ cm + 4 \ cm + 4 \ cm + 3 \ cm + 7 \ cm = 2(7+3+4) \ cm = 2\cdot14 \ cm = 28 \ cm[/tex]
[tex]b)\\Ob = 2\cdot5 \ cm + 3 \ cm+ 7 \ cm + 2 \ cm = 10 \ cm+12 \ cm = 22 \ cm[/tex]