2×6=12 cm2
2×5=10 cm2
5×5÷2=12,5 cm2
12 cm2 + (12,5 cm2 +10 cm2)×2=12 cm2 +45 cm2=57 cm2
obietość 5×2×5=50 cm3
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2×6=12 cm2
2×5=10 cm2
5×5÷2=12,5 cm2
12 cm2 + (12,5 cm2 +10 cm2)×2=12 cm2 +45 cm2=57 cm2
obietość 5×2×5=50 cm3