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GGB4
Author:
王博賢
GeoGebra
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常见四边形是否是双心四边形
圓周公式的應用
垂直線的斜率
比較五件物件的重量
直線的斜率：水平變化 & 鉛垂變化
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拋物線規
Trianglar prism
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
高考椭圆题的动态演示2.许兴华数学
直线与平面垂直的折纸实验
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Division
Trigonometry
Line Segment
Diagrams
Linear Functions