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平四2
Author:
数豆豆
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
球體建築師
Discover Resources
七巧板
模擬圓規
Rolling Star
平面外積、有向面積、二階行列式
圓內接四邊形任務一: 提示一
Discover Topics
Power Functions
Mathematics
Circumcircle or Circumscribed Circle
Line Segment
Equilateral Triangles