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相切的三圓
Author:
高淑蓉
GeoGebra
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算柱 (兩位數)
【案例】2018年全国1卷理科12题
畫出對稱圖形
柱體建築師
三位數除以一位數（二）
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task2
餘弦公式_1
圓錐曲線的光學性質
正立方體展開圖
龙形曲线-分形龙2
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Similar Triangles
Arithmetic Operations
Quadratic Equations
Trapezium
Vectors