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證平行四邊形 (對角線互相平分) (對邊 // 且相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
球體建築師
四邉形 (四年級) 教師版
sanjiaohanshu
兩組對邊相等的四邊形
近似值:有效數字
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豆奶
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