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橢圓動畫
Author:
chen mingchuan
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
画直线等分三角形的面积
算柱 (兩位數)
第八周作业
Discover Resources
Simultaneous Linear Equations 聯立二元一次方程
正弦定理
直线与椭圆
猴子攀樹
堆垛
Discover Topics
Definite Integral
Ratios
Translation
Ellipse
Median Line