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Author:
Joshua Tseng
GeoGebra
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兩位數加法
拼砌四邊形
四邊形的特性
找出對稱軸
三位數除以一位數（一）
Discover Resources
畫鐘面
四位數
Multiplication of Polynomials(多項式的乘法)
勝者即正義
柱面
Discover Topics
Congruence
Limits
Parallelogram
Fractions
Rhombus