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三棱锥的三视图
Author:
DongHai Zhang
GeoGebra
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【案例】2018年全国1卷理科12题
異分母分數減法
算柱 (兩位數)
找出對稱軸
兩位數除以一位數（一）
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三角形的兩邊中點連線
三角函數圖解
不規則區域著色
Angle Between a Line and a Plane Definition 線與平面的交角 定義
旋轉對稱 Rotational symmetry
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Distributions
Equations
Complex Numbers
Cuboid
Terms