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tessellation design
Author:
Hsin Han Wang
GeoGebra
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兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
画直线等分三角形的面积
兩組對邊相等的四邊形
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Quiz on Interest 利息：測驗
三角形的垂心
如何求切線長
Ex5C#3
比較角的大小二
Discover Topics
Arithmetic
Random Variables
Cosine
Equilateral Triangles
Piecewise Functions