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選擇合適的「中間人」
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
GeoGebra
New Resources
算柱 (兩位數)
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
兩位數加法
判斷球體
Discover Resources
四邊形四個九點圓共點(九點心)
ie 3
各種五邊形
mooc第四讲椭圆反射
圆的面积展开的副本
Discover Topics
Linear Functions
Rectangle
Vectors 3D (Three-Dimensional)
Trigonometric Functions
Circumcircle or Circumscribed Circle