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[洋葱] 17 勾股定理与将军饮马Q1
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洋葱教研
GeoGebra
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近似值：有效數字
美國國旗 (Claude 版)
兩組對邊相等和有直角的四邊形
第八周作业
判斷球體
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高線
均分除法（分數÷整數）
ie 8
ghseh 二次函數描點法左右平移-2
黃金三角形
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Geometry
Quadratic Functions
Rotation
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Linear Equations