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Author:
johnmayhk
GeoGebra
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四邉形 (四年級) 教師版
判斷球體
找出對稱軸
畫出對稱圖形
兩位數除以一位數（一）
Discover Resources
畢氏定理動態證明(歐基里得，平形四邊形等面積，應用polyline)
Conic Sections
中点轨迹
利用Geogebra說明直線方程式的類型與性質
滑桿應用
Discover Topics
Quadratic Functions
Sequences and Series
Combinatorics
Rational Numbers
Subtraction