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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
Fibonacci Clock
球體建築師
判斷球體
AI 訓練教室
兩組對邊相等和有直角的四邊形
Discover Resources
三角形的面積
畢氏定理平移版
straight line
圖形的周界
高考椭圆题的动态演示2.许兴华数学
Discover Topics
Pie Chart or Circle Chart
Isosceles Triangles
Angles
Sphere
Solids or 3D Shapes