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橢圓
Author:
洪宜慧
GeoGebra
New Resources
直角坐標平面上的旋轉變換
畫出對稱圖形
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
小数 的副本
Discover Resources
Circle
科博館的水畢氏三角
proof3(1-1)吳奕杰
梯形(面積)
工具：PlaneArrows, PlaneText... (v.2)
Discover Topics
Fractal Geometry
Sphere
Hypergeometric Distribution
Constructions
Upper and Lower Sum or Riemann Sum