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面積這個詞包含的內容多了,你要的是誰的面積!二維平面:不管是怎樣的多邊形,做法只有一個,通過畫輔助線切割或拼接成你熟悉的的圖形,比如三角形,梯形和平行四邊形等三維立體:每個面都是二維平面,所以,把每個面用二維...
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