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九點共圓
Author:
廖奕翔
GeoGebra
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找出對稱軸
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
兩位數除以一位數(二)
兩組對邊相等和有直角的四邊形
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a sin(bx+c) +d
圓上圓
加法(粒條)
正立方體變菱形12面體
拋物線代數性質,光學性質
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General Quadrilateral
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