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三角纏繞畫
Author:
Pin Lun
GeoGebra
New Resources
拼砌四邊形
判斷球體
畫出對稱圖形
球体的体积推导（优化版）
第八周作业
Discover Resources
Apollonius Problem gergonne 1
ie 7
雙心運動
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
圖形D
Discover Topics
Integers
Coordinates
Cone
Arithmetic Operations
Functions