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垂直線
Author:
arist
GeoGebra
New Resources
第八周作业3
平行線的判定
活动三：应用性质
龙形曲线-分形龙
第八周作业
Discover Resources
橢圓軌跡 (2)
http://www.qsir.org/?p=8853
正四面體
球體表面積
正方体展开图的副本
Discover Topics
Geometry
Cone
Line Segment
Curve Sketching
Symmetry