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dhc987
GeoGebra
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【案例】2018年全国1卷理科12题
GeoGebra笔记功能体验课件
拼砌四邊形
錐體建築師
畫出對稱圖形
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數學作圖
Normal Vector
包絡菱形
p05 eqidistant from two lines
两角差的正弦公式证明2
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Set Theory
Congruence
Quadrilaterals
Algebra
Normal Distribution