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根據百分率找數量（二）: 例3的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
拼砌四邊形
球体的体积推导（优化版）
異分母分數減法
球体的体积推导
兩位數除以一位數（一）
Discover Resources
說明用01
尤拉的介紹與尤拉線的證明
Sunline
正多面體
碎形三角形
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Combinatorics
Sine
Straight Lines
Symmetry
Parametric Curves