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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
直角坐標平面上的旋轉變換
球體建築師
Nested spiral octagon
算柱 (兩位數)
拼砌四邊形
Discover Resources
Cube in Perspective 正方體的透視
向量的伸縮
transformation_rotation
例题2（P点可拖动）
直线与圆相切
Discover Topics
Rhombus
Trigonometric Functions
Fractal Geometry
Cylinder
Subtraction