Kwadrat podzielono na dwie jednakowe prostokąty z których każdy ma Obw.42cm.
Obłicz obw. tego kwadratu.
b ---- bok kwadratu
a i b ----- boki 1 prostokata
b = 2a
2a + 2b = 42
b + 2b = 42
3b = 42
b = 42 : 3
b = 14
Ob = 4 * b = 4 * 14 = 56cm ------- odpowiedź
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b ---- bok kwadratu
a i b ----- boki 1 prostokata
b = 2a
2a + 2b = 42
b + 2b = 42
3b = 42
b = 42 : 3
b = 14
Ob = 4 * b = 4 * 14 = 56cm ------- odpowiedź