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TB-CJH-OVER.
Author:
Hyacinth Wang
GeoGebra
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判斷球體
球体的体积推导
四邊形的特性
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
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圓內接四邊形 ABCD ...，求 sinθ=?
錯覺藝術
Prism and Cylinder 1
弧度制的意义
旋轉方塊
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Sequences and Series
Linear Functions
Circle
Variance
Line Segment