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Author:
赵林
GeoGebra
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sanjiaohanshu
異分母分數減法
畫出對稱圖形
兩組對邊相等的四邊形
找出對稱軸
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[工具箱] 標示長度
容積盒子(加蓋)
分割三角柱
动态曲线
向量阵列
Discover Topics
Division
Sine
Ratios
Straight Lines
Polygons