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Equation of lines
Author:
Haoxiang Luo
GeoGebra
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折扣
直線的斜率
撒针估算面积实验
常见四边形是否是双心四边形
圓周公式的應用
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Trigonometric Ratios: Sine 三角比：正弦
test
七巧板
DSE Circle-ACT04 Cyclic Quadrilaterals
捷徑問題
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Trigonometry
Difference and Slope
Dilation
Symmetry
Geometric Mean