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已知正三角形內部一點到三邊距離求面積
Author:
連琨銘
GeoGebra
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百分數及其應用
撒针估算面积实验
龙形曲线-分形龙
三角函数 的副本
常见四边形是否是双心四边形
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triangle
切線性質
transformation_rotation
Sunrays with different angles
題 2
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Trapezoid
Parabola
Polynomial Functions
Exponential Functions
Fractions