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俄罗斯方块
Author:
孟宝兴
GeoGebra
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直角坐標平面上的旋轉變換
兩位數加法
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
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GGB報告
正三角形堆垛
指令
雙曲線1-焦點法
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Difference and Slope
Scalene Triangles
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Trigonometry