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Author:
万超杰
GeoGebra
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畫出對稱圖形
兩組對邊相等的四邊形
sanjiaohanshu
直角坐標平面上的旋轉變換
找出對稱軸
Discover Resources
五上_分數乘法(教師版)
百分數（小學）：折扣 / 賺賠（HTML5 版）
testing
圆锥的侧面展开图3D动画的副本
反射原理的副本
Discover Topics
Dilation
Quadratic Functions
Angles
Percentages
Derivative