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Quiz on Discriminant 判別式：測驗
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
畫出對稱圖形
球体的体积推导（优化版）
四邉形 (四年級) 教師版
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
Discover Resources
雙曲線的軌跡
费马点
telling the time
三角形的內角和+內心與外心
标题
Discover Topics
Equations
Limits
Sequences and Series
Parallelogram
Median Value