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圆锥曲线折纸操作题（教材案例）
Author:
蔡永志
Topic:
Conic Sections
,
Ellipse
,
Hyperbola
GeoGebra
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第八周作业
異分母分數減法
找出對稱軸
算柱 (兩位數)
判斷球體
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GGB 基礎教學（平面幾何）
ttttt
圓心角
展開圖折合遊戲
兩位數乘三位數直式
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Mathematics
Sphere
Volume
Line Segment
Incircle or Inscribed Circle