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doublehelix
Author:
lamanleung
GeoGebra
New Resources
盈利與虧蝕
椭圆内切圆链
龙形曲线-分形龙
第八周作业
折扣
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waaachen
線性變換矩陣(二階)
四邊形四個九點圓共點
正七角錐(旋轉,實體、透視)
畫圓周範例檔
Discover Topics
Cylinder
Quadratic Functions
Angles
Perimeter
Solids or 3D Shapes