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欧拉线与三角形1
Author:
林峰
GeoGebra
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活动三：应用性质
第八周作业
正方形雪花图案
第八周作业2
斐波那契螺旋弧线（表格法-可动态调节）
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球內接正方體
Box method for multiplication
Angle Between Two Planes Definition 平面與平面間之交角 定義
鉛筆畫圓
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Cone
Tangent Function
Distributions
Cosine
Symmetry