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橢圓軌跡_過圓內一點與圓內切
Author:
Wu Xiao-Ren
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
找出對稱軸
三位數除以一位數（一）
四邉形 (四年級) 教師版
Discover Resources
斜率
正割函數的絕對值圖形
angle in semi-circle
圓內接四邊形的圓周角
动点最值问题&抛物线模型
Discover Topics
Volume
Quadratic Equations
Kite
Geometric Transformations
Rectangle