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椭圆焦点三角形演示
Author:
LaoCH
Topic:
Conic Sections
GeoGebra
New Resources
畫出對稱圖形
四邊形的特性
兩位數加法
判斷球體
兩位數除以一位數（二）
Discover Resources
彩虹三角
三角形四心
AirParcel
同分母分數比較_胡老師
我的第一个绘本
Discover Topics
Curve Sketching
Secant Line or Secant
Parallelogram
Interest Calculation
Functions