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極座標 r=cos(Θ / 2)
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GEOGEBRA啟
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
球体的体积推导
判斷球體
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三独立开关电路
[問題] 線在面上
艾雪鑲嵌2
合 24（附答案）
Completing the Square (Part 3)
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Surface
Vectors 3D (Three-Dimensional)
Trapezoid
Functions
Quadratic Functions