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球的内接正四棱锥
Author:
冯德福
GeoGebra
New Resources
百分數及其應用
第八周作业
双心四边形
第八周作业1
直線的斜率：水平變化 & 鉛垂變化
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圖三
Copy of 固定周界的長方形的面積變化
垂線作圖
拋物線2--焦點法
纏繞畫2
Discover Topics
Reflection
Arithmetic Operations
Vectors 3D (Three-Dimensional)
Area
Sine