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椭圆的定义（第二定义）
Author:
桃篮翁
椭圆的定义（第二定义）
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
判斷球體
柱體建築師
三位數除以一位數（二）
異分母分數減法
Discover Resources
軌跡,摺紙,滾動,實驗觀察,曲線
ie 3
p04 equidistant from two points
Testing
面積題 E
Discover Topics
Rational Numbers
Rhombus
Step Functions
Trapezoid
Straight Lines