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Author:
hou yi ting
孢落限
GeoGebra
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兩位數除以一位數（一）
画直线等分三角形的面积
判斷球體
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
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Desargues 定理
籐編直線與曲線
不規則圖形的周界(intro)
Orthographic views example
二重積分 (Double Integral)的副本
Discover Topics
Definite Integral
Parallelogram
Cuboid
General Quadrilateral
Fractal Geometry