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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決 
梯形下底該怎麼算
Jan 10th 2015, 12:08

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(上底+下底)x高 除 2 所以 84x2 除 8-7 底=14...
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