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tan(α) tan(β) = ?
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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三位數除以一位數（二）
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
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拼砌四邊形
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優良作品5
拋物線與直線相交弓形區域
黃金矩形
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椭圆内切圆链
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Logarithm
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