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q5-9
Author:
johnmayhk
GeoGebra
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兩位數加法
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
異分母分數減法
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button
周界
齊找對稱軸
gjc096a19 平行四邊形內截兩扇形
椭圆中的一个定值问题的动态演示.许兴华数学
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Quadratic Functions
Straight Lines
Isosceles Triangles
Parametric Curves
Rotation