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Author:
Yin Kelvin Wong
GeoGebra
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異分母分數減法
直角坐標平面上的旋轉變換
算柱 (兩位數)
四邊形的特性
sanjiaohanshu
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直线与椭圆
平行四邊形面積
八角柱(可側轉、上下轉)
Areas of squares and rectangles_Question A至E
數學傳播39卷4期, 平面幾何公式思考
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Area
Orthocenter
Division
Tree Diagrams
Statistics