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圓柱截痕
Author:
陳基正
GeoGebra
New Resources
兩位數加法
柱體建築師
第八周作业
錐體建築師
拼砌四邊形
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動態比大小
斯霍滕(Schooten)定理(與角平分線定理等價)
拋物線2-焦點法
劉徽的「割圓術」的副本
马鞍面旋转
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Cube
Cone
Integers
Parallelogram
Similar Triangles