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橢圓軌跡
Author:
Ching-Hui Chou
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
【案例】2013年安徽高考15题
判斷球體
球體建築師
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已知橢圓 x^2/a^2+y^2/b^2=1 (a>b>0)
畫三角形 題1f
p04 fixed distance from a line
Magnitude of cosine
圆在直线上滚动
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Vectors
Geometric Transformations
Trigonometry
Set Theory
Integers