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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
球體建築師
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
Discover Resources
SIN伸縮平移
圆锥的侧面展开图3D
多邊形面積(分割法)
對稱之美
圆内接与圆外切多边形
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Real Numbers
Cube
Terms
Power Functions
Vectors