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三角函数的副本
Author:
haixiang xu
,
邓粤海
GeoGebra
New Resources
判斷球體
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
異分母分數減法
畫出對稱圖形
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三角形三邊關係
均分除法（整數÷整數）
glt-c02-10 六角柱旋轉
S5 chauyy
勾股定理：射影无字证明
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Cube
Median Line
Sphere
Area
Linear Programming or Linear Optimization