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平行线间的等积变形-第一题
Author:
tfflowers
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
算柱 (兩位數)
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
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動畫
正多邊形各邊中點連線所圍成的圖形v2
squence
線性規劃
Conway's Circle
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Inequalities
Means
Arithmetic
Orthocenter
Cone