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circle: line from centre
Author:
Ng Ching Yi
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩位數除以一位數（二）
四邊形的特性
柱體建築師
Discover Resources
美麗的剪紙
直方圖_for_student
max{f(x),g(x),s(x)} 與 min{f(x),g(x),s(x)}
直線與圓(直線方程式圖形特性3)
題三
Discover Topics
Arithmetic Operations
Confidence Interval
Integers
Trigonometry
Vectors 3D (Three-Dimensional)