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橢圓軌跡_過圓內一點與圓內切
Author:
Wu Xiao-Ren
GeoGebra
New Resources
球體建築師
四邊形的特性
異分母分數減法
兩位數除以一位數（二）
畫出對稱圖形
Discover Resources
圓內接四邊形--預習工作紙
扇形柱(調整底面圓的分割數，柱高)
乘方
畢氏定理(等面積變形法)
微元法演示
Discover Topics
Volume
Indefinite Integral
Vectors
Mathematics
Congruence