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證平行四邊形 (對角相等)
Author:
W.L. Wong, Albert
GeoGebra
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三位數除以一位數(二)
拼砌四邊形
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數(二)
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winter vacation homework 8
火箭
垂心與垂線
圆的面积展开的副本
雙曲線2-焦點法
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Pie Chart or Circle Chart
Coordinates
Logarithm
Derivative
Quadratic Equations