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waaachen

Author:陳兪宏

waaachen

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sanjiaohanshu
兩位數加法
柱體建築師
兩組對邊相等和有直角的四邊形
找出對稱軸

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三角形五心與角度關係
Fill the circle
堆剁蕊
五上-CP4-第三节平行四边形面积1
摺正三角形

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Constructions
Orthocenter
Perimeter
Trigonometric Functions
Tangent Line or Tangent

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