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圓周角觀察操作
Author:
陳隆期
GeoGebra
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三位數除以一位數（二）
兩組對邊相等的四邊形
找出對稱軸
拼砌四邊形
畫出對稱圖形
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判斷柱體 3
軌跡方程式-垂直切線
quiz 9.1 2(d)
向量與坐標
繪畫四邊形
Discover Topics
Fractions
Line Segment
Step Functions
Conic Sections
Equilateral Triangles