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Author:
張道民
GeoGebra
New Resources
兩位數除以一位數（二）
畫出對稱圖形
球体的体积推导（优化版）
三位數除以一位數（二）
異分母分數減法
Discover Resources
畫三角形 題1a
Locus: Equidistance From Two Parallel Lines
象形圖 (找出最多/最少)
聖者即正義
Copy of 劉徽的「割圓術」
Discover Topics
Bar Chart or Bar Graph
Coordinates
Intersection
Arithmetic
Volume