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餘弦定理修正項及風車證明

Author:薛鈞聰

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兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
【案例】圆柱体内放置一个大球六个小球
柱體建築師
判斷球體

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優良作品3
proof25陳佑豪
九點圓
斜線2
固定三角形的條件−題2的副本

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Quadratic Functions
Linear Equations
Similar Triangles
Hyperbola
Cuboid

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