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根據百分率找數量（一）: 例4的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
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一點點小範例
正n星角
Question 8
gjc91v127 三角形旋轉
动点最值问题&抛物线模型
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Addition
Statistics
Intersection
Inequalities
Quadrilaterals