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转盘
Author:
许业成
GeoGebra
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多邊形的面積
探究三角形的全等條件
漂亮的摇摆曲线
祖冲之的期望:内棋与外棋
直線的斜率
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公切線長度的計算
扇形面積
仿生機械
百葉窗2
用方程解周界問題
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Sequences and Series
Vectors 2D (Two-Dimensional)
Continuity
Parabola
Root