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谢鹏
GeoGebra
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四邉形 (四年級) 教師版
畫出對稱圖形
直角坐標平面上的旋轉變換
Fibonacci Clock
找出對稱軸
Discover Resources
比和比值
三角函數圖形（全）
軌跡為橢圓或雙曲線
三角形的高
中國剩餘定理 (Chinese Remainder Theorem)
Discover Topics
Rotation
Subtraction
Logarithmic Functions
Line Segment
Trapezoid