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ASS 的觀察
Author:
均一
GeoGebra
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三位數除以一位數（一）
【案例】2018年全国1卷理科12题
畫出對稱圖形
近似值：有效數字
兩組對邊相等和有直角的四邊形
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平行四边形面积演示
可积准则
gjc090b13 二次函數的平移
旋轉對稱 Rotational symmetry
椭圆的离心率
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Fractal Geometry
Intersection
Similar Triangles
Prism
Sine