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任务7：内外弦图
Author:
陈丽婷
GeoGebra
New Resources
兩組對邊相等的四邊形
第八周作业
兩組對邊相等和有直角的四邊形
球體建築師
畫出對稱圖形
Discover Resources
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
正十二面體內接正六面體旋轉
轴对称的两点的动画演示.许兴华数学
中心投影、平行投影
素因数分解 Prime Factorization
Discover Topics
Vectors 3D (Three-Dimensional)
Inequalities
Hypothesis Testing
Equilateral Triangles
Arithmetic