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纏繞圖 20180317四箴國中研習
Author:
哆啦爸爸
GeoGebra
New Resources
四邉形 (四年級) 教師版
四邊形的特性
拼砌四邊形
異分母分數減法
三位數除以一位數（一）
Discover Resources
Tangents from an External Point
練習1
動畫
Copy of Liu Hui's Method of Finding π
“勾股树”最极易迭代法单晨制作实验16
Discover Topics
Interest Calculation
Linear Functions
LCM and GCD
Reflection
Percentages