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相反数 思考（教材第10页）
Author:
陈力
Topic:
Algebra
GeoGebra
New Resources
第八周作业
画直线等分三角形的面积
找出對稱軸
拼砌四邊形
判斷球體
Discover Resources
距離和
對稱(LEVEL 1)
圓錐展開圖
面積趣味題
达芬奇椭圆仪
Discover Topics
Histogram
Unit Circle
Variance
Hypergeometric Distribution
Scatter Plot