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期中五-3.1
Author:
俞长家
GeoGebra
New Resources
球体的体积推导（优化版）
四邊形的特性
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
Discover Resources
正方變十字
美麗的剪紙
task6
正方形截痕
Copy of 劉徽的「割圓術」
Discover Topics
Incircle or Inscribed Circle
Algebra
Isosceles Triangles
Upper and Lower Sum or Riemann Sum
Arithmetic Operations