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parabola, b varies, a, c fixed
Author:
perspect
GeoGebra
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直線的斜率
撒针估算面积实验
三角函数 的副本
圓的基本性質
平行線的判定
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pictures
優良作品7
平行線 (同位角 - 1對)
繡曲線
圓周公式的應用
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Triangles
Quadratic Equations
Fractions
Sine
Dilation