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龍騰4_1-1課例5
Author:
廖傑成
GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
近似值：有效數字
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水波干涉
立體截面
area 面積3
初中数学
Copy of 分數加法
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Reflection
Arithmetic Mean
Matrices
Difference and Slope
Statistics