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三角函数
Author:
jason ni
Topic:
Trigonometric Functions
,
Trigonometry
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
三位數除以一位數（一）
兩位數除以一位數（二）
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畫三角形 題1e
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證平行四邊形 (對角線互相平分) (對邊 // 且相等)
等腰直角三角形
轨迹最值功底测第8题
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General Quadrilateral
Plane Figures or Shapes
Differential Equation
Diagrams
Mathematics