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圆锥曲线包络
Author:
朱亮
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
三位數除以一位數（二）
球體建築師
兩位數除以一位數（一）
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Drawing quadrilaterals on the grid or the pinboard
任意三角形外心與外接圓
Ex.2
三视图积木
斜率是定值
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Kite
Logarithmic Functions
Tangent Line or Tangent
Tree Diagrams
Geometric Distribution