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三角形等差數列比 共線
Author:
Rex Chi
GeoGebra
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百分數及其應用
三角函数 的副本
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
平行線的判定
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function3
冷氣機的銷量
算幾不等式
堆疊
动圆与两圆外切与内切(2)
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Statistics
Sphere
Algebra
Reflection
Triangles