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活动二
Author:
刚哥数学
Topic:
Geometry
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
錐體建築師
球體建築師
Discover Resources
折射率的定義
第二次:20190110
简易立体几何的副本
Fill the circle的副本
兩位數除以一位數（一）
Discover Topics
Trapezium
Planes
Root
Statistical Characteristics
Distributions