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三角形三內角和
Author:
洪得祥
GeoGebra
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兩位數除以一位數（二）
三位數除以一位數（二）
判斷球體
算柱 (兩位數)
第八周作业
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平行四邊形柱展開
Angle between Lateral Faces 1
Graph of Quadratic Function 二次方程圖像
gjc096b28 等腰三角形邊上一點與角度
圖形的周界 3
Discover Topics
Straight Lines
Reflection
Stochastic Process or Random Process
Equilateral Triangles
Indefinite Integral