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正方形内外弦图
Author:
数豆豆
GeoGebra
New Resources
第八周作业3
第八周作业2
直線的斜率：水平變化 & 鉛垂變化
双心四边形
撒针估算面积实验
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三角形重心(相關說明)
弧度與角度
阿波羅尼斯相關問題：與兩相切圓外切和一圓內切
B3C2-2例7-1
可控九九乘法口诀表
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Rotation
Statistics
Trigonometric Functions
Equilateral Triangles
Piecewise Functions