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gjc102a14 三角形內的高
Author:
均一
GeoGebra
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兩組對邊相等的四邊形
球體建築師
異分母分數減法
GeoGebra笔记功能体验课件
三位數除以一位數（二）
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乘法1
教學－直線方程性質
大字體
折扣 例2的副本
探索勾股三元数
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Diagrams
Cone
Frequency Distribution
Geometry
Right Triangles