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开关灯小游戏
Author:
孟宝兴
GeoGebra
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柱體建築師
兩位數除以一位數（二）
四邊形的特性
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
Discover Resources
三角形外角和
gdss
量角器3
Geometry: Types of Angles 2 (幾何：角的種類 2)
二面角
Discover Topics
General Quadrilateral
Histogram
Unit Circle
Random Variables
Exponential Functions