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Tedt

Author:bigsai0730

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直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
異分母分數減法
兩位數除以一位數（一）
sanjiaohanshu

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數學傳播39卷4期, 平面幾何公式思考
Trigonometric Ratios of Any Angle
複數：正方形內的正方形
极值点方式求圆心
圆面积和周长展开示意图

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Geometry
Circumcircle or Circumscribed Circle
Cuboid
Orthocenter
Function Graph

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