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incircle
Author:
xieying
Topic:
Geometry
This firgure shows in circles.
GeoGebra
GeoGebra
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常见四边形是否是双心四边形
活动三：应用性质
科赫雪花
第八周作业
斐波那契螺旋弧线（表格法-可动态调节）
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圓 點 直線
題二
Copy of 方格紙上畫四邊形
周界
分項對消式的寫法的副本
Discover Topics
Prism
Equilateral Triangles
Definite Integral
Quadrilaterals
LCM and GCD