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折扣 例5
Author:
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
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
拼砌四邊形
Discover Resources
Triangle fixed height
謝爾賓斯基三角形(Sierpinsky)
直線與圓的位置關係
Hamid Naderi Yeganeh segment4
正四面體碎形
Discover Topics
Straight Lines
Terms
Mode
Addition
Hyperbola