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gyzel 橢圓的反射
Author:
均一
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
近似值：有效數字
長方體平面投影 (Codex版)
美國國旗 (Codex 版)
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Is this a prism 3
優良作品5(盈彤)
角平分線
venn图
「相似三角形」任务4的副本
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Matrices
Fractions
Algebra
Histogram
Surface