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纏繞畫
Author:
洪源朗
GeoGebra
New Resources
畫出對稱圖形
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
拼砌四邊形
判斷球體
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愛心曲線
How to draw a hexagon with ruler and compasses?
正12面體內的正四面體製作
基础知识
（三）观察物体
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Geometric Distribution
Optimization Problems
Root
Intersection
Cuboid