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Parallelogram 01
Author:
iedc
GeoGebra
New Resources
兩位數除以一位數（一）
球体的体积推导（优化版）
【案例】2013年安徽高考15题
三位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
dabuhe
旋轉體：Washer Method
厚會聚透鏡 Thick Convergent Lens
wiki
西瓦定理
Discover Topics
Median Value
Circumcircle or Circumscribed Circle
Equilateral Triangles
Differential Calculus
Quadratic Functions