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二面角
Author:
qianqianhouhou
二面角的概念，拖动A、E点改变半平面
GeoGebra
New Resources
拼砌四邊形
算柱 (兩位數)
画直线等分三角形的面积
畫出對稱圖形
【案例】2018年全国1卷理科12题
Discover Resources
判斷球體 4
方格纸上画平行线和垂线
Redefining Trigonometry by a Unit Circle
軌跡方程式-垂直切線
Question 4
Discover Topics
Linear Regression
Kite
Parallelogram
Continuity
Sequences and Series