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Author:aoaaceai

NOTHING

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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)
sanjiaohanshu

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七巧板
一元二次不等式
平面幾何
畫三角形第3題
小正多边形在大正多边形内的滚动（边长不相等）

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Geometric Mean
Boxplot
Multiplication
Planes
Scalene Triangles

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