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Author:
Cathyyu920311
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
異分母分數減法
三位數除以一位數（二）
第八周作业
Discover Resources
坐標幾何（中一）
不盡相異物的排列
長方形
褶正三角形
Copy of 「相似三角形」任务1
Discover Topics
Orthocenter
Normal Distribution
Geometric Mean
Rhombus
Subtraction