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Comparing_fraction
Author:
Lttcmooc
GeoGebra
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GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
四邊形的特性
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
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Demo
三角形内角和，演示
二面角的副本
Slope of a tangent 切線斜率
漂亮的摇摆曲线
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Triangles
Hypothesis Testing
Logarithm
Straight Lines
Addition