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anlge at centre twice angle at circumference
Author:
lamyc
GeoGebra
New Resources
兩組對邊相等的四邊形
拼砌四邊形
三位數除以一位數（二）
兩位數加法
球體建築師
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圓交與公切線
Angle between a Line and a Plane 投影與線面角
複合圖形體積(三角形與四邊形結合)
作業
五邊形的簡介
Discover Topics
Vectors 3D (Three-Dimensional)
Root
Mode
Solids or 3D Shapes
Definite Integral