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test05繪本用
Author:
趙偉晉
GeoGebra
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三位數除以一位數（一）
兩位數加法
拼砌四邊形
画直线等分三角形的面积
兩組對邊相等的四邊形
Discover Resources
Constructing Quadrilaterals by Four Sides (2014)
椭圆的定义
爱心
justin sin
赵爽弦图
Discover Topics
Hypothesis Testing
Hypergeometric Distribution
Normal Distribution
Ellipse
Volume