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congruent (SSS)
Author:
Ricky Chan
GeoGebra
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兩位數加法
第八周作业
GeoGebra笔记功能体验课件
四邊形的特性
兩位數除以一位數（一）
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waaachen
正三角形
構作對稱圖形
玖数小学数学
海宇的第一个GGB绘本
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Equations
Set Theory
Rational Numbers
Combinatorics
Curve Sketching