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因為:12=1×2×2×3 所以有: 長:4個,寬:3個 長:6個,寬:2個 長:1個,寬:12個 三種拼法,且周長分別為: 4×2×(4+3)=56cm 4×2×(6+2)=64cm 4×2×(1+12)=88cm 因為:56
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