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三角形面積
Author:
maths_p5
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
常见四边形是否是双心四边形
中华人民共和国国旗
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基測試題旋轉
我的解法
Number of solutions of two straight lines
Exterior Angle Cyclic Quadrilateral
圓周公式應用題2的副本
Discover Topics
Linear Equations
LCM and GCD
Arithmetic Operations
Numbers
Definite Integral