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keddy940199
GeoGebra
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【案例】2013年安徽高考15题
兩位數除以一位數(二)
錐體建築師
拼砌四邊形
兩組對邊相等和有直角的四邊形
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line equation
中線定理(阿波羅尼奧斯)定理推廣二:向四邊形推廣
khkhk
畢氏數
圆之吻(Apollonius circles)
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Pyramid
Sine
Curve Sketching
Parallelogram
Subtraction