Odpowiedź:
ćw. 1
168:8=21 cm
Obw.: 8×2+21×2= 16+42=58cm
ćw. 2 A, D (1/2×6×3)=1/2×18=9 cm2
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Odpowiedź:
ćw. 1
168:8=21 cm
Obw.: 8×2+21×2= 16+42=58cm
ćw. 2 A, D (1/2×6×3)=1/2×18=9 cm2