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Triangle

Author:Drwang

Topic:Triangles

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近似值：有效數字
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
拼砌四邊形
長方體平面投影 (Codex版)

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quadrilaterals 2
Classifying Quadrilaterals
祖暅之《綴術》：「緣冪勢既同，則積不容異。」
Question 1(Angle)
四角錐體的截面

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Intersection
Percentages
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Reflection
LCM and GCD

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