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圓柱側面積 (1) 原柱側面積=底面周長×圓柱的高 S側=c×h 因為c=2∏r c=∏d 所以圓柱側面積還可以寫出:s側=2∏r h 或 s側=∏d h (2) 底面周長=圓柱側面積÷圓柱的高 C=s側÷h 底面直徑=圓柱側面積÷圓柱的高÷圓周...
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