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利用Geogebra說明y=ax2＋bx＋c圖形性質
Author:
Galen_1
GeoGebra
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第八周作业3
折扣
撒针估算面积实验
比較五件物件的重量
双心四边形
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绘你妈本
All in one (centres of triangle)
圓心至弦的垂直平分線
【折纸】A4纸折四面体
两角和的正切公式几何证明
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Similar Triangles
Kite
Algebra
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