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20200108中线倍长大法
Author:
陈敦莹
GeoGebra
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拼砌四邊形
sanjiaohanshu
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
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sin(x)0-720
if指令
Geometry: Angles Sum of Triangle (幾何：三角形內角和)
Trigonometric Ratios
方格紙上畫正方形 2
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Equations
Circumcircle or Circumscribed Circle
Constructions
Derivative
Exponent