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动态三角形
Author:
陈先生
GeoGebra
New Resources
拼砌四邊形
第八周作业
四邊形的特性
兩位數加法
兩位數除以一位數（一）
Discover Resources
應用題解題法
telling the time
S2,3,5 Statistics
函數平移
第八周作业1
Discover Topics
Quadratic Functions
Unit Circle
Symmetry
Quadratic Equations
Volume