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外接圓的心
Author:
chihyuliu
GeoGebra
New Resources
异形操场
折扣
比較五件物件的重量
活动三：应用性质
圓的基本性質
Discover Resources
test
Rugby Ball
判斷錐體 2
等截距和直線包絡拋物線
交錯級數(Roger B. Nelsen)
Discover Topics
Secant Line or Secant
Logic
Conic Sections
Cone
Rectangle