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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
第八周作业
異分母分數減法
找出對稱軸
畫出對稱圖形
柱體建築師
Discover Resources
waaachen
circle: line from centre
erwtewt的副本
戴德林球
正n邊形內角與外角的副本
Discover Topics
Prism
Subtraction
Orthocenter
Polygons
Pythagoras or Pythagorean Theorem